Always had lots of technical ability, his attitude was an issue. Seems likely the attitude has been improved as he's matured. However he was never very physical, not especially quick and certainly not big or strong, and if there's one thing the Premier League requires, it's being able to hold your own physically, usually with pace. I think that could trouble him.
For example, if we lined Ryan Fraser up against him, I know who'd I'd back in that duel. And most PL cubs have someone of that ilk.