The problem is affecting WAR/MAR also. I was running some low level dungeons/guildhests last night as a MAR and could BARELY hold threat, even on single mob pulls. I don't think I even had the opportunity to use Maim or Fracture because using a non-enmity generating move that was on GDC would have caused me to lose threat. There were even a couple of times where I had full threat on a mob and it would still turn around and target the scholar's pet! I never had this issue in these same dungeons pre-2.3.