If Klopp wanted him I'm sure there's a good reason for it. We just need to give him the time that he needs to adjust, as Klopp seems to have no problem in doing.
I, however, in my unending ignorance, am a little confused about him. Even if his game sharpens up he doesn't quite seem to have the engine that I have associated with Klopp-style midfielders so far. He looks a bit lanky and a bit cumbersome. So I'm curious of what he will add to the team when he's fully up to speed and has been fully klopperised.