Before I start this post, I know the ability Shoha seems to be getting a change in Endwalker.

Shoha - 3 Meditation stacks for a 400 potency OGCD. Real flashy combo finisher.
Hissatsu: Senei - 1100 Potency 2 min CD that is used as the typical starter to the SAM burst window.
Hissatsu:Guren - 850 Potency AOE frontal cleave, which shares the same CD as Hissatsu:Senei.

Why do I mention these 3 abilities? Shoha seems to be rather lacking in utility, as you build towards it with Iajutsu/Tsubame-Gaeshi/Meditation. These 3 abilities generate meditation stacks, which upon building 3, you can use Shoha for an OGCD 400 potency attack.

Looking at the optimal SAM rotation for DPS, you'll notice Hagakure (Normally used as a combat reset, as stickers are built during combat) is used to delay your rotation to line up with Hissatsu:Senei.

My suggestion: Give Shoha an additional effect of lowering the CD of Hissatsu:Senei/Hissatsu:Guren. This would help round out the optimal rotation, and would also give the added benefit of being able to utilize Hissatsu:Guren more often in dungeons for AOE combat.