User blog comment:SilverRain/Ichigo's True Strength/@comment-1706259-20130630131928/@comment-7092747-20130630165704

Have to agree with Captain Brooks on this. Aizen's increasing transformations resulted in him becoming more and more cocky. It had been pointed out that normally he would have been able to dodge even the simplest of attacks but that he had become so overly confident in himself that he abandon simple tactic for brute force (which has never been Aizen's style).

While Ichigo certainly became very strong, he also was fighting Aizen far removed from his usual state. Aizen's final few transformations were a good reveal of just what he had truly become inside: a monster void of logic.