No, you can use size to your advantage on both sides of the fight. Just because Wlad uses his size doesn't mean he wins with his size. He has to be able to use it. Inversely Mike's whole gambit is to use your size against you. It's the use not the size. His size can become a deficit if Mike takes advantage and he doesn't have an answer. Neither of the K2 bros learned how to turn. I can't see them having a good chance against Mike.
We've already got one. The name just hasn't changed. Cruiserweight, essentially, is the classic heavyweight division. Practically all 210 pounders cut to it, as do many 215 pounders.
Nar, he's behind one of his conquerors for starters. But yeah, i think any great HW that is outweighed by 20+lb has a great claim to call himself the P4P King.
Aside from that do you consider him one of the best p4p? Like if Lewis, Buster Douglas, Danny Williams and Kevin McBride were all his size would he have beaten them?