Lukaku told Sky Sports last month that he is ready to take the next step in his career and move to a club playing in the Champions League next season.
Collymore has suggested that he understands the Belgium international striker regarding his future.
“The instant reaction to Lukaku’s comments might easily be that here’s another disloyal Premier League upstart, biting the hand that feeds him after Everton spent £27million giving him a platform to shine,” the former England international wrote in The Mirror.
“But I’m with him all the way. He’s dead right to be thinking if it’s time to look elsewhere he must take his career to the next level. Because, with Everton’s recent track record, he’s not going to get there with them.”
Collymore, though, believes that Lukaku is far from the finished article and has highlighted certain flaws in his game.
“For me, he doesn’t run with the ball as much as he should,” the former Nottingham Forest and Aston Villa striker wrote in The Mirror. “And sometimes I wonder if he’s just too nice because his physique is frightening.
“I’ve noticed, when it’s not going his or the team’s way, he can lose the ball cheaply and his head can go down.”
Lukaku is one of the best and most promising young strikers in the Premier League and has been in good form so far this season.
The 22-year-old has scored 18 goals and created 47 chances in 30 league matches for Everton this campaign.
The former Chelsea striker has a pass accuracy of 74% and a shot accuracy of 53%, and has won 70 headers, 33 dribbles and six tackles.