The problem is the boosted 90's. It came at the worst possible time, as there is nothing to "force" them into learning the class like levelling does. We had bad 90's before but not on this scale.
It's come to the point now where the good players are no longer queueing for LFR or joining Flex raids, so it will just end up with a bunch of boosteds running around getting nothing done, lol.