I think there is validity to this point.When we are on the 'Front foot' and controlling a game, Eze performs with aplomb.
When we have our 'Backs against the wall' and are being dominated he tends to disappoint.
Eze is a player of great talent, but he has a tendency to go through spells where he makes minimal impact on games, bar one or two nice touches.
As our form improves, I would hope that Eze would improve too. This seems more likely than him alone being the catalyst for our improvement.