User blog comment:Xilinoc/Ch. 602 - Bane Licking Good/@comment-28861328-20141023151805/@comment-5693502-20141024073026

I think a small part of the reason for Yhwach's "glorified temper tantrum" has been explained already; he needs all this chaos and death to survive and prevent him from reverting into a vegetable. I'm going to assume his main reason for his actions will be explained later on. I think it's kind of decent not knowing what his big plans are in a way, since it leaves you with a bit of mystery both in-universe and in real life.

It's also why Yhwach seems a lot more pragmatic than Aizen. With Aizen, everyone knew what he wanted to do, so the Gotei and allies could better prepare themselves in ways on how to stop him from getting what he wanted. With Yhwach, no-one knows what the hell he wants to do (except for maybe Haschwalth and possibly even Uryū), so the Gotei don't really know what to do to stop him. Also Yhwach seems a lot more driven in reaching his goals than Aizen; which may or may not be a good thing. Obviously it's all opinions, but in the traditional sense of a villain I'd say Yhwach is much better than the magnificent bastard that Aizen was.

I still think it's a good arc, there's been some dodgy moments sure, but still a good arc.