I know this all happened on page 4, but yes, Weidman has very good BJJ, more of a Jeff Monson style submission grappler than a jiu jitsu player though.
He's a top game guy but he trains under Serra so I imagine he has a decent guard.
Erick - Hype is justified, he will smash Fitch and smash GSP, i'll take bets from anyone on either of those fights.
Weidman - I was impressed by the Maia victory considering the circumstances, he wrecked Munoz (who I don't rate very highly), for now the hype is a little strong but in the future he will live up to it. Right now I don't think he has anything for Andy.
Gustafsson - excellent fighter, will fight for the title more than once in his career and if Bones vacates he may well hold the LHW title but I can't see him ever beating Bones.