Hum...AS expected Tousen is doing it for revenge of his honey love...Tousen is actually kinda like Sasuke...only Tousen's actually good and interesting. And his friends don't exhume retarded erotic lust all over the place. They get disappointed at him but then they have to do what they have to do. Komamura's a trooper.
Kishimoto could take a lesson or 2 from this.
only lesson to be learnt from bleach, is to give all characters cool weapons...and give the main char some panel time.
Its just simple power level expansion because of the long run of the manga. Like in DB, a single Super Saiyan is supposed to appear every 1000 years and Goku was planned to be that one, a couple volumes later every character with Saiyan blood can do Super Saiyan 2...