Further elaboration on why the over all changes are bad in comparison to other jobs, especially monks rework that rolled out in several patches;
Kaiten's largest issue with it's removal is that it invalidates kenki management as well, and if a resource is becoming invalidated as it no longer needs to be managed, then it stands to reason that the resource should be removed entirely.
I no longer even keep kenki on screen as I just press shinten when it lights up, pooling has also become less important with trick attacks raid buff removed, and Ikishoten granting us half of our kenki for the only remaining raid buff window now at 2m.
Shoha can't even be pooled in any tangible way since you need to get it out between Iaijutsu / Ogi Namikiri, so just press that sucker as soon as it glows!
Kaiten was the only thing keeping my eyes on managing kenki, and now that it's gone I no longer need kenki as a visual reference.
(It's like having the DRK's Darkside Gauge before obtaining The Blackest Night, I kept asking why the fuck is this job gauge a thing?)
They can change Shinten into a charge based CD similar to Bloodletter / Rain of Death (Shinten / Kyuten) and save on ui bloat while retaining what amounts to the exact same gameplay since we gain the resource statically.
Ikishoten could even grant 2 charges of Shinten / Kyuten and it would be literally the same.
So yeah they can delete kenki now lol.
And hopefully give us a completely new resource? There's no guarantee though. Especially since such an enormous change would likely be saved for 7.0 roughly 2 years from now, of boring boring gameplay.
Which is kind of why Kaiten's removal is such a sore spot for me since it indicates that they have no real plan, unlike Monk which rolled out good and gradual changes over the course of several patches, then saved the final and most challenging changes for 6.0 after introducing loaaaads of welcome changes, IE building trust.