No wonder Aizen left Soul Society. Though I'm not really sure why he didn't leave 100 years ago.

I didn't find any plot holes. I was in complete agreement with Ichigo on this one. Imagine you see captains flying around killing allies. I'd be like WTF are you guy doing? Really, should Ichigo fly in the middle of that?

However, I was cheering for Aizen to kill them all off for most of the ep.