It was also a season when Ashley Young played like Angel Di Maria and Angel Di Maria played like Ashley Young. Phil Jones also had a spell of taking corners, which had Manchester United fans in disbelief.
So, how did each player perform as we reflect on the 2014/15 campaign? Here are your 'out of ten' player ratings for Manchester United.
David de Gea - 9
Easily worth 12-15 points to Manchester United this season. Without his presence between the sticks at Old Trafford, Louis van Gaal's men are not achieving a top four finish in the league. The future Spanish No.1 made a few mistakes near the end of the season but that's likely to be due to having half an eye on goings on in Madrid.
Victor Valdes - N/A
Only made one start, on the final day of the season against Hull City due to David de Gea picking up an injury a week earlier. Top class when it came to shot-stopping, but suffered in the air similarly to de Gea when he initially moved to the Premier League. Remains to be seen whether Valdes will be deemed good enough to be Manchester United's main goalkeeper.
Antonio Valencia - 5
On his day, a good footballer, but United have seen little of that this season. Perhaps that's a harsh conclusion as he was played out of position at right-back despite the availability of Rafael Da Silva. Fans will be hoping to see Ed Woodward lift them out of their misery by signing someone better suited to the role.
Paddy McNair - 6
Taking his opportunity when injuries plagued Louis van Gaal's defence, McNair demonstrated his talent on the ball. The Northern Ireland defender requires upper body work and awareness off the ball. A work in progress for Manchester United.
Tyler Blackett - 5
Comfortable on the ball but needs to improve a lot to make it as a regular in the first team.
Phil Jones - 6
A liability not only to himself but everyone around him. Jones had good spells throughout the season but is not fully there just yet and could be running out of time.
Chris Smalling - 7
Towards the end of the season, Smalling began to look like a Manchester United defender. Everyone seems to forget how convincing he looked in his debut season at the club and that ability is starting to shine through again. If any defender deserves a regular starting place in the current squad, it has to be Smalling.
Marcos Rojo - 7
After an average World Cup playing at left-back for Argentina, who as a team reached the final against winners Germany, Rojo seemed to improve the more he played. For the most part, the former Sporting Lisbon defender played as a centre-back, where he looks more comfortable. Requires a senior partner and fewer injuries but showed a nice edge to his game throughout the season.
Luke Shaw - 6
A tough season for the England international dealing with injuries and settling at a big club. Although, United fans enjoyed watching him fly past Chelsea's Branislav Ivanovic and hope to see similar sights next season.
Jonny Evans - 4
It looks like the Northern Ireland international has played his final season for Manchester United. A different player under Sir Alex Ferguson, it appears as though the 27-year-old has not coped well with the Scot's retirement. Shot of confidence and looking a shadow of his former self, Evans will want to forget about his performances from this season as he plies his defensive trade elsewhere.
Rafael Da Silva - N/A
Unfortunately for Rafael, the Brazilian didn't get much of a look in. He showed a great attitude throughout his stint at Manchester United but his future appears to be elsewhere.
Daley Blind - 7
Arriving from Ajax as a holding midfielder after a World Cup campaign positioned at left-back for the Netherlands, United fans had no idea what to expect from Blind. His best performances came in Shaw's absence at left-back, due to looking like a Michael Carrick lite version in midfield. Blind will, however, be an asset at Manchester United for a long time.
Michael Carrick - 8
"Hard to believe it's not Scholes". Playing wise, I couldn't disagree more, but in terms of over-reliance, United looked woeful whenever Carrick was out injured. He is the Rolls-Royce of Louis van Gaal's team, but without his presence the midfield looks like a Fiat Cinquecento. At 33-years-old, United need to start planning without Carrick, but that won't be easy.
Ander Herrera - 7
Didn't get much of a look in at the beginning of the season but once the Spaniard got a run in the team he was adored by the United faithful. Great on the ball, an eye for goal and likes a tackle. This is a midfielder Manchester United have needed for some time.
Juan Mata - 7
Produced arguably United's best moment of the season at Anfield and scored his fair share of goals. Had his spells out of the team and it looked at one point as though he would leave the club this summer, but Mata returned and set the hearts of fans pounding. A brilliant footballer who deserves to be cherished at the highest level.
What a turnaround. Last season Fellaini was mocked for his shambolic playing style and David Moyes, who knew him best, did not help the situation by attempting to morph the Belgian into a deep-lying midfielder. Louis van Gaal used Fellaini as a nuisance for the opposition and he got himself on the scoresheet on numerous occasions. However, when talking long-term, United may want someone with more footballing ability and better discipline.
Ashley Young - 9
Will the real Ashley Young please stand up? Whatever happened to Young this year, United fans will hope it continues into next season amid talk of a new contract, according to Neil Ashton of the Daily Mail. Louis van Gaal's best outfield player this season despite many casting their doubts about whether he would ever reach his potential.
Angel di Maria - 3
It started well for Di Maria at Manchester United but after the 5-3 defeat at Leicester City when he hobbled off injured, it all turned sour and his form was dismal. Basic skills such as passing looked a struggle for the former Champions League winner and now his future, according to the Daily Mail, is in jeapory after just one season. The Red Devils’ record signing has been a flop and United fans can only hope if the 27-year-old stays, the real Di Maria shows up.
Adnan Januzaj - 5
So much more was expected from Januzaj this season. After a brilliant breakthrough season under David Moyes, the 20-year-old struggled to adapt to Louis van Gaal's frequent changes in tactical approach. These may be teething issues, but Januzaj needs a loan move where he is guaranteed regular first team football to further his development.
Wayne Rooney - 7
Wasted in midfield for much of the campaign but showed his true ability when selected up front. Has become an admirable captain, not one to cause a fuss when the manager demands a specific job and looks to be enjoying life again at United.
Robin van Persie - 5
When he's fit and on form, van Persie is still one of the best strikers in the world. It was a surprise to see him look so disinterested when played this season, but United fans still hope they can coax one last big year out of their Dutch front man. Especially after the announcement on the club’s official website regarding Radamel Falcao being sent back to Monaco.
Radamel Falcao - 3
When you consider what was expected when Falcao arrived at Carrington on Deadline Day, the season-long loan spell that followed was beyond underwhelming. Perhaps it's not his fault that a previous ligament injury appears to have decimated his career, but you cannot blame the club for not pursing the deal longer. Four goals! What on earth has happened to the lethal goalscorer that is El Tigre?
James Wilson - N/A
Should have featured on a more regular basis after showcasing promising signs. United fans will hope to see more of Wilson in the future.
Last, but not least... Louis van Gaal - 6
The Dutch manager has worked wonders with Young and Fellaini but his tactics often made United look pedestrian. Has instilled greater confidence in the club ahead of big games, picking up better results than the previous season, although sloppy encounters with the likes of Leicester City and Burnley need to be addressed if United are going to challenge for the title any time soon. He is learning more and more about the English game and United will be stronger next season.