To be honest with the way Dembele, Dier and Alli are playing and how important they are, he is not going to get into the first team straight away. Also other players would have impressed while he was injured so its only fair that he is below them in the pecking order.
that's right, no-one should automatically come back into the team when the team has been playing well. Doesn't stop it being great to see him back playing again