The feedback has already been acknowledged and adressed.
They even delayed two reworks because of the negative response...

I think they either will return Kaiten and make it be what results in auto-crits which I'd be totally fine with.
Or there is some other underlying reason they'll talk about.

One thing I saw being brought up about why DRG for example is getting a rework is that DRG simply can't be added to anymore and it kinda need to be reworked so it can evolve in the future.
I am not sure how I feel about that but I can at least somewhat see the logic there, and I do think these are very complex issues especially since they like to add new stuff to Jobs every expansion.
At some point it becomes so much it's hard to add more to it ( and people already complain about too many buttons, keep doing it every expansion too ).

I am not saying it's a good or bad thing personally I don't have an issue at all with even more buttons and more added to it.
But it's not a black and white issue and I do think that if you want to evolve the game and keep moving forward then drastic changes are going to happen at some point.
I think the Kaiten thing may even have been prep for something else in the future and they just misjudged it and made the change way too early.
I think generally speaking if they're gonna push through big changes it shouldn't happen in increments, it kinda feels shitty to play something stripped down in preparation instead of the completed thing all at once.
Sorta the same issue with SMN too, I think current SMN has potential to be great but it's unfinished.
So maybe the SMN rework should simply have been delayed too until it was complete like it'll probably be in the next expansion.