This is exactly why GSP needs to just stay at 170.
To protect the legacy of the next WW Champ? GSP needs to move up in his own interest and for his own legacy, but IMO should not do it unless Anderson Silva moves up.
I think it's ignorant to downplay a fighter who obtains the belt without fighting the current/ex Champ. A fighter is No.1 Contender, GSP moves up, what can he do about it? Nothing, it's nothing to do with him and GSP has moved for his own reasons, no one else's.
If the title becomes vacant and you defeat the next highest contender, you are the Champ fair and square, GSP is irrelevant he's not in your division anymore.