Adding my piece to the conversaion.

1. As detailed in https://forum.square-enix.com/ffxiv/threads/458421-An-Examination-of-Kaiten-and-Action-Bloat-on-Samurai, simply removing Kaiten does very little to resolve the non-existant "Action Bloat" issue. On top of this, SAM barely have to double weave.
2. Kaiten was not removed in 6.0, this means throughout 5.x neither the playerbase nor the dev team considered it to be action bloat.
3. Kenki Gauge is now effectively meaningless, there is close to zero decision making to be had when using Kenki, even Gyoten/Yaten are the same potency per Kenki as Shinten.
4. The use of Third Eye was further encouraged by extending its duration, thus making it easier to use. This goes against the intention of both lowering action bloat, and reducing skill gap.
5. Crit variance only became a major problem because they chose to turn SAM into a fixed 1min burst job in 5.x with big potencies on select skills. This was not a problem back in 4.x when Hagakure was used to convert Sen into Kenki into Shinten spam for a more smoothed out damage profile.