The biggest change beside the potency nerfs, kaiten removal, one button smash for gauge etc to me is the aoe ability potential of a samurai in dungeons and during big pulls.

*Tenka goken* to me got hit really hard: *It doesn't auto crit* like midare, (neither higanbana auto crits!).
THESE two at least should have been able to auto crit to balance the kaiten changes.

Why? Well in big pulls you often used kaiten before tenka goken to buff it up. Adding on top: *Kaeshi:Goken potency reduce from 420 to 280!* .
That's same as normal aoe and it's not guaranteed to crit so you pretty much gaining NOTHING with Kaeshi but just copy of the spell!! Kaeshi was supposed to give you a damage boost to make it feel more satisfying!
*At least if the ability auto critted* , after 4-5 ability usages you had a reliable high dmg aoe to look forward. *420 to 380* (so Kaeshi increases by 100) would have been an understandable nerf move. Don't think making the spell "circular" makes it do more dmg, just some minor QOL imo.

In addition *Kaeshi:Namikiri reduced from 1350 to 800*; I'm still scratching my head on that. It's literally same as normal Namikiri which at average ~ high median ceiling dps is a drastic loss of damage.
*1350 to 1050* (so Kaeshi increases by 200) would have been an UNDERSTANDABLE nerf move. Or even lower the CD to 80s to accommodate the change!

TLDR *potency change together with Kaeshi dmg nerf on any ability* (literally now being a button to just copy the last ability with no buffs whatsoever) is what killed it for me.