I agree with the person above.
If they really wish for samurai's abilities to be guaranteed critical hits, why doesn't Kaiten simply get changed to:
->Makes the next weapon skill do critical damage.

The potency adjustments they worked on so far can be the same since they were adjusting to count for Kaiten's 50% more damage to be removed, but hey we can make everyone happy as Square Enix does listen to feedback right?

And for button bloat, how about removing Shoha 1, and increase the damage on Shoha 2?
Or making Ikishoten turn into Ogi Namikiri when used?