Why?
Anyone can say he averaged 90%, but passing is a lot more than that - it's about making the correct decisions, being able to spot a team mate (and having the technique to pull it off), making yourself available etc. Fellaini doesn't have the touch, movement, spacial awareness or passing range required of a United midfielder - which is fine, it's not his game.
I have no problem with him playing much further up the field where he is very effective and where we are utilising his best attributes.