FGs have a triple-mark and huge decks and presumably no 6-like-cards cap, so they can pack all sorts of control of both kinds and it's very hard to exhaust their supply and still draw breath. So quint and PA get more use there. Is Aether as universal in PvP, AI3/5, or T50? No, not really. PvP especially, since you really don't know what to expect. You get some wacky opponents there.