I think if you go back and look at most poorly received job changes, you can usually trace them back to one person forcing their pet idea on the forums without regard for the current design for the job. Looking back, there was at least one thread advocating for Kaiten's removal in the past. Perhaps history would be different if people spoke out against that suggestion back then.

If you are passionate about your job, then you do need to step in and make it clear upfront that you don't want the devs to do this. There's no point complaining after the fact.

I personally think removing the draw time on Iaijutsu is a terrible idea for SAM, because it's part of the job's personality. You can rename 'cast' to 'draw', if you like, but it's very much central to the job.