While everyone is asking for the changes to be reverted back to 6.08 I'd like to add on to those reversions. We could literally still have everything SAM every had from 4.0 with what we have now. I may not know how numbers in this game work, nor do I pay attention to them outside of the occasional glance at the number that flashes on screen above my target, but like.... with the way jobs have been getting transforming buttons under certain status procs, there's no reason why we can't bring back older skills now.

People have already gone on to show why 'button bloat' isn't an issue, and plenty have gone well into detail about why 'APM action bloat' hasn't been fixed either due to the removal of Kaiten.

So while we're on the train of asking for things back, I want to ask for more:
Third Eye - Open Eyes was a good thing. Open Eyes can change Third Eye to Merciful Eyes (and please, increase the heal of that to at least be similar to Second Wind role action) / Open Eyes can also change Shinten into Seigan with increased potency OR reduced cost (and that is the one I want most alongside Kaiten back)

Ikishoten change into Ogi Namikiri into Kaeshi Namikiri. I am legitimately confused why this wasn't already a thing to begin with. Reading the tooltips (and somehow missing the fact it had no such text of *This action cannot be assigned to a hotbar) I thought that was how it worked and went into 90 content without the ability to use it outside of the actions & traits window. That should be changed.

Senei and Guren... seems to be a 50/50 split on folks who want these to be merged or stay separate. Alternative, make another status proc to change Shinten and Kyuten into Senei and Guren respectively.

Shoha 1 and 2, I will say seems kind of lazy. While logical, the theming on SAM has typically always felt on point. I think Shoha can upgrade to targeted aoe with fallout splash. Or potentially they could make the effect dependent on how many meditation stacks there are. 3 minimum to use. 5 for a medium and 8 for maximum effect.
(The 8 suggested is intentional. With how many jobs have become more referential to characters in FF6, MNK got Blitz from Sabin, MCH got a decent chunk of Edgar's tools, SAM iaijutsu being based off Cyan's sword tech that had to wait for a charge to use)

While this would be a lot of work to include and adjust, I personally believe that a toolset shouldn't be completely changed unless it was already bordering on unplayable.

TL;DR - Don't nerf or take away. Add onto what's there and bring back what was taken away.