Goodness sake, give the lad a chance. Since his return, he's played 45 mins in a friendly game that none of our other players could be accused of giving a standout performance in either.
Most of the players have had the chance to play under Ancelotti and his system/style of football for a few months now. The sensible thing to do would be to allow Kenny the same opportunity to try and prove his worth to the manager. Then, at least, Ancelloti can assess the player, and what he offers, and make a more informed decision on whether or not Kenny has future with the club.