Cazic thule aggro problems
 

He's not summoning any mobs to him on engage anymore

Downed CT today, he was summoning mobs just like he usually does.

I had ~20 mobs on me for the whole fight so id say you are incorrect. I believe this has to do with the mob leashing thing, I was at west wall.

He *attempted* to summon mobs. However, as I watched him die the only add you may have gotten were the ones in his immediate vicinity(Fright/Nightmare). The train (which usually returns upon engagement of CT) stayed glued to the person training.