I think he's being overly criticised for the performance. Obviously it wasn't the greatest performance however when he had the ball centrally it was the only time their defensive unit got pulled out of place and he was able to play some nice through balls leading to good chances. No one else on the pitch managed to do this.
His pressing game has improved but his positioning and decision making still has a way to go. I feel he's one of our only players who has the potential to make something out of nothing ala Zaha, Olise, Eze.
Plus he's still only 20 years old FFS he has plenty of time to improve. Ebz first half of last season was pretty poor for a player with his experience and talent but look how that ended!
Agree about Sosa though he hasn't impressed me much, but he was bought as a cheap back up I guess, and that's exactly how he's playing.