Ignore the "he's shite & lazy" posts and have a look at the more reasonable ones.
Pellegrini is building our teams around accommodating him in the starting line up. He wasn't the problem in terms of performance tonight no, but by playing him we have to play 2 more midfielders (DM & CM) to cover for his statue impersonations when we're not on the ball - this leads to (a) us having to drop an attacker (Sterling today) & (b) our most dangerous player being shoved out wide & out of the game (KdB or Silva).
Do you think Yaya/Fernandinho are better than Silva/KdB from the attacking midfield position? Because that's who they're replacing in this formation.
Do you think KdB is better on the left wing than the middle? Because that's where he gets pushed in this formation.
Do you think Sterling carries so little threat that he should be on the bench? Because that's where he was tonight due to this formation.
Do you not think that a 2 out of Fernando/Fernandinho/Delph in CM would have enough legs in midfield? Because that's the alternative, with all our front 4 in their favoured positions.
Personally don't like having square pegs in round holes & a disjointed line up just to make space for one player who isn't even our best player/performer.
If you disagree with my points then fair enough, but to me it's hard to fit Yaya into our starting 11 for a lot of the "tougher" matches nowadays without it being more detrimental than beneficial.