There were times last season when he was sensational. Easily one of the most exciting players to watch in the PL and he has everything in his locker.
That said, he’s only really had a good 6 months in his career. It wasn’t that long ago he wasn’t even considered a PL standard player.
I remember players like Michu, Zaki and Geovanni having outstanding purple patches in the PL before their form fell off a clip and reverted to type.
The problem Brighton have is that if Mitoma repeats the form of the last six months next season, they’re not going to get maximum value for him due to his contract situation. Likewise, if his form drops I doubt any of the top European clubs will be interested in him.
Assuming he won’t sign a new deal at Brighton, this summer is probably the best time for them to sell him. I wouldn’t be surprised in the slightest if they accepted around £40/50 million for him.