Personally I'm able to live without Kaiten, but the reason of removal being button bloat stirs me.

Things you could consolidate:

Shoha -> Shoha II: Upgrade, like PLD Expiacion
Guren -> Senei: Upgrade, keep Guren range but make it cone for wider AOE and obviously potency upgrade
Ikishoten -> Ogi Namikiri: button combo

Also for the love of god, give me back Tenka Gokken's cone AOE, this is as awful as the Overpower change for me.