Fury stepped up several levels. If you think he is the same fighter that fought McDonut then it is your way of thinking that needs fixing
By far the biggest issue on this forum - people seem to pick a poorer performance from past history and apply that to EVERY fight they'll ever have... at least if it's not their preferred fighter. Fury has developed so much since there, as evidenced by the fact that he has already beaten Klitschko fair and square, and convincingly.