First, I want to commend SE for actively reducing button bloat in Dawntrail for Samurai, particularly with Zanshin replacing Ikishoten and also rolling Shoha 2 into Shoha (although did you really have to make it a line attack?). However, I'd like it if this went just a little farther via more combo buttons. Here are my suggestions:

Hakaze/Gyofu > Yukikaze
Shifu > Kasha
Jinpu > Gekko

These are the three that I'd like the most. It's another simple way to reduce button bloat and they make sense. No one ever wants to do Gyofu/Hakaze, Shifu, or Jinpu twice in a row. Doing this woudl give us three buttons back.

Additionally, this one would be nice as well:

iajutsu > shoha
Iajutsu turns into shoha after gaining 3 stacks of meditation. Once again, there is no scenario where someone would want to cast any iajutsu skill when at 3 stacks of meditation. They'd always want to use Shoha before that as to not waste meditation stacks.

That's it! and with 3 - 4 reclaimed buttons, this woudl give the job room to bring on an additional skill and still be somewhat button lean.

Thank you for listening.