SAM improvements that needed in the next patch.

[cactuarzzzz]

A simpler fix, or at least in my mind a more fitting one, would be to simply have Iaijutsu apply a status effect that Tsubame-gaeshi plays off, allowing you to effectively stagger the use of Tsubame-gaeshi to weave it more efficiently. To copy from Red Mages playbook, something like Kaeshi : Setsugekga Ready after doing a Midare, which lasts X seconds, allowing you to weave GCDs between Midarea and Kaeshi : Setsugekga as needed.

Going the whole "Samurai isn't a melee caster!" route, when that's literally been its gimmick since day one is... Odd, to say the least...

Having only Iaijutsu doesn't feel like a caster since in SB you can use shinten instead of Midare.
In SB we can ignore meditate and we can convert sen to use shinten instead of midare but it isn't like that in SHB.
Now in SHB we got 2x Casting from Iaijutsu + charging meditate for shoha.
Anymore than this and we are offially a melee caster.