honestly i blame SE more for this. If you listen to every crap you destroy your game easily.
It was like the mob/spell increase. It was a CHEAP way trying to have the crowds shut up for a bit.

And if a system is a bit annoying, you could just think about it and change it in a smart way. But AI is a weak spot in most games, not only mmos. So i think they decided to just leave it out... even though we wouldnt even need a great AI... a bit more then utter stupidity would suffice