People give him hell all the time but I think there is an honest to goodness player in there and when Koeman realized he couldn't get it out of him he was discarded as gash (and lets not go through the mind of Allardyce). Silva should just keep him on the sideline as a sub for a while. Especially if we cant sign either a ST or winger and one of Niasse/Tosun or Walcott/Lookman leave.
The manager should put whoever is the best option on the bench. The lad has no future here. He hasn't scored a league goal in 2 seasons. It's debatable if he has a future at top flight football in any major league.
It's best he moves on and gets to enjoy his football again in a less pressurised environment.