I think he's a good player, I just think it's unnecessary to play him in a midfield three with Pogba and Herrera against teams like West Ham. We really should only be employing 2 players to play through the middle, three is overkill especially when it is Herrera and Scott with Pogba.
I think he will become a really good player for us, I'd rather see us use him in a different formation against teams we really be should be beating, instead of in a three where there is always going to be at least one other player in the formation doing the same thing as him.
Think he will end up as a DM for us or even part of a back three as Neville suggested.