I don't think the issue is the players on the bench, but more Smith failing to use substitutions tactically. Can't recall a single time a substitute changed the complexion of a game for us this season. Yet El Ghazi, Trez, Hause, Nakamba, etc. have all played well when they've been given a chance - so it's clearly not the lack of quality on the bench. Look at Burnley, they turned the game around by bringing on the likes of Cork and Vydra - far from world beaters.