Coutinho netted a 35-yard free kick on the stroke of half time to cancel out Theo Walcott's opener, before then adding a third goal after Adam Lallana had fired Jurgen Klopp's side 2-1 ahead shortly after the break.
The 24-year-old has blown hot and cold during his three-and-a-half year stint at Anfield for the most part, but he has looked a lot more consistent since Klopp replaced Brendan Rodgers last October.
Wright says that Coutinho was more or less "unplayable" against the Gunners, and believes Liverpool fans have plenty to get excited about if their go-to-guy replicates that magic on a regular basis this season.
"Some have accused the Brazilian of not turning it on against the top sides, but at times he was almost unplayable," he wrote in The Sun.
"When he’s in this form, there is a lot for Liverpool to look forward to."
Coutinho netted eight times and set up five in the Premier League last term - a return he could and probably should comfortably better this time around.
His overall play is sensational but the diminutive South American needs to be more productive - and early indications are that he will be this season.