I don't see Oladipo being a 30ppg guy. He could get into the mid-20s I think depending on the rest of the team. He is very good at getting into the lane and getting fouled which helps to get those higher ppgs.
He looks like the wing version of Shawn Marion to me, a guy who can be really really good at all aspects of the game, but without quite having the potential to be a truly great player. He is a great pick compared to what you would have had if Cleveland had not totally outsmarted themselves.