Why do people automatically feel the need to come in to a thread that's discussing Yaya and claim anybody that isn't 100% positive about him is slagging him off? The op hasn't slagged him off he's raised a valid point and one that is becoming increasingly apparent the more games we play without Yaya.
Yaya changes our entire style, for certain games it may be beneficial to play that way but the main complaints when we fail to win have been there's a lack of tempo, movement and urgency on the ball and a lack of mobility or trackers in midfield off the ball. These are all strongly linked to Yaya. I'm not saying it's entirely his fault but seeing as the team is pretty much built around him when he plays it's fair to say he's at the heart of it.
With the players we've got, i think we're fair more suited to a quick tempo, pressing and countering game than a more methodical possession based game that involves us trying to break down walls of 10 players just for the opportunity of a shot. You can't take too much from yesterdays game as Villa clearly weren't arsed in the slightest but every time we've played without yaya we've looked a much better side. His role should now be primarily on the bench and to come on for the last 30 minutes to get on the ball and dictate the play either to control the game when winning and see it out or to look for a killer pass or one of his trademark goals if we're in need of a goal.
I don't think pellegrini is willing to do that though.