It's the same effect regardless. Everyone jumped on the "this must be a change targeted at the ae deep lvl'ers" bandwagon with no evidence of it. Is it a possibility? Sure, it's definitely a possibility but DPG haven't said why so everything is just speculation. They've been slowly nerfing every classes ability to AE for years. SK swarm kiting, bard dirge, beam kiting etc. It was only a matter of time before enchanter stuns got hit and it actually would have been more out of character to skip past enchanter AE stun given that they have taken away most other classes ability to kill an absurd number of mobs at the same time. I've never done any normal AA grinding or leveling outside of AE'ing from Luclin through PoP on any TLP, so yeah the change sucks. But you'll live, trust me.