Agreed, but has anyone considered this. Manuel said that if you look at Yaya's stats and the amount of mileage he covers in every game, it stacks up against anyone at the club, but there's one major thing those stats don't cover which is dynamism.
There is a world of difference between someone running 10km in a straight rhythmic line as opposed to sprinting for 10 metres sliding in to tackle a player getting up whilst shrugging off that player and sprinting 20m forward and setting up an attack time and time again. Fernandinho can do it and Delph is showing signs he can too, but Yaya is big 32 year old brute of a unit and it just isn't his style and he's not capable of continuously playing in this energy sapping way. Anyone who has done circuit training will attest to the difference.
Our coaching staff must be aware of this, so why is Yaya continuously left exposed in a midfield two time after time again when everyone can see it's not his game. At this time of his career, Pirlo was managed and became the essential pivot for Juve to win title after title and to reach the CL final, to me this is where the Yaya problem lies. Pirlo dictated the play an was surrounded with more dynamic legs around him to do his graft and it worked. Its worked for us and Yaya before, all we have to do is look at Sevilla away.