As for the video:
Well, alright, but how about this: How about devs make those changes. Period. They've just removed it without replacement, why? I could understand sentiment that it could be replaced for something better, but this something better is still not in the game, so why can't we have Kaiten while we wait for this something better to be released? How is 8+ CPM Shinten better alternative?
And I would say it was connected to job in good way (in today's standards). As I mentioned previously, Kenki is pretty solid gauge compared to others, a lot of gauges in game are just terrible 0-100, use 50 gauge for skill which does bland damage, or other skill, which also does damage, but it's AoE.
As for Hagakure, I haven't played in SB, so there's not much I can say, but from I saw other people say, they weren't very fond of the Hagakure spam. From what I'm seeing, people were most satisfied with SAM at shadowbringers era.