I'm thinking of leveling a Samurai to 70 and maining them instead. Not sure how much more complex Sam gets at lvl 70, but right now it's a lot less stressful, low risk, and high reward.
Low risk, high reward is pretty much SAM in a nutshell. The Sen management stuff is just iterating three combos (Kasha > Gekko > Yukikaze; or basically, Haste > Damage% > Slashing); Kenki at 62+ is pretty constant at generating resource and you dump it all one oGCDs. For the most part, the two systems are unrelated as Sen is used solely for Iaijutsu and Kenki is used for just your oGCDs. Hagakure (68) lets you convert Sen into Kenki but it's hard to really mess up using it that much whenever it's up.
Priority wise, Kaiten + Higanbana and Kaiten + Midare Setsugekka whenever you're going to do them, convert Sen to Kenki via Hagakure when its up with 3 Sen (or if needed to smooth rotation), Shinten as often as you can without dipping too low for Kaiten use. Most the mistakes in SAM rotation stuff aren't that costly on their own and the entirety of the Kenki system is more of a "make sure you end with zero meter" rather than "use the moment you can for maximum uptime" stuff which makes it a lot less rigid too.
It was fun seeing you all, says the PLD as YoshiP shoves them back into the hole under the stairs.
I'm not expecting a huge potency nerf (at worst, -> 400 potency) to Holy Spirit, though I find any touching of it when it's coupled with actual potency increases for WAR+DRK to be pretty goddamn questionable. Unless they're pushing Holy Spirit cast to >2.5s GCD, increasing the cast time just makes it clunkier to use / fit inside Requiescat too rather than touching the damage so I'm not too worried about that side of a change messing with it much.
I'm still mostly on the side of "why even nerf a tank if actual buffs for the others?" but eh, SE decision making.