Well this chapter was good for a good reason, for me, it was good because it clears out all the Aizen's fanboy tribe rage.
Now it is clear that Aizen isn't the strongest ever. The 4 Oldest captains are still ready to fight and can sure kick ass, Genryussai taught two actual captains.

Now if in the winter battle, Aizen is not killed or at least easily ownd, that will, for me, fuck things up.