He is a developmental project. He has the speed and strength to make plays with his feet but he needs to work on his technique and delivery if he's ever going to succeed in the NFL as a QB.
Aaron Rodgers had an extremely odd delivery when he was drafted at 24th overall but was able to learn and develop with the coaches and is now arguably the best QB in the game.
Could Klein have the same results? Most likely no, but there is room to dream.