That's the problem. The bar was so high that any drop off is seen as underperformance. It may be underperformance by his very high standards but it is not complete crap. First five games of the season, five wins, five Yaya performances in a midfield 2. He was at fault for the first goal on Saturday (Along with others) but after that he was steady if not spectacular.
Against Sunderland the other week, we were 3-0 up in 20 minutes with him pulling the strings and his performance against Palace when he came on was excellent.
He was so good for 3/4 years that this level is seen as crap when it isn't.
My opinion is he shouldn't be playing two games in a week (Bet he does Wed though) and DB and SIlva should not also start when he does. it should be 2 of the 3.
More rotation and better management of him and he will still be useful for another couple of seasons. We will miss him when he is gone. I've no doubt about that.
Lets get Pogba ;)