He is gone. If not this season, next season for sure. If he stays this season, he'll be mainly used as a back-up for Pogba or Zlatan.
I don't think we need to worry about him moving deeper. I was trying to clear the misconception that he is a central midfielder. He is an attacking midfielder in a three or a number 10, as far as I am concerned. Personally, I like central midfielders to be more nuanced and with a good passing range. A good and functioning central midfield is key to a good style of play.
What I want is to sign another midfielder: preferably Ruben Neves or a more mobile version of William Carvallaho in addition to Pogba. I'll be a happy camper if this is our midfield make-up next season:
Carrick/Neves
Schneiderlin/Herrera Pogba/Perriera