Quitting because they adapted whm to conform to a new meta seems reasonable to me... if you can't adapt then you certainly won't be welcomed in raids and endgame content... so quitting probably for the best... it's not like they changed most of the classes or anything... dps roles losing several buffs, Aoe dropping off.... tanks actually having to be in tank stance to tank, losing personal dps.... personally I'm looking forward to the change...