Egi glamours are really the only way to implement the majority of the other Primals without serious button bloat. SMN is already in need of a serious amount of consolidation and a look back at why they kept Aetherflow for so long in the first place. To me, they could remove a ton of cooldowns and rely on states to track where SMN is in during its rotation while using Aetherflow as a clock. Aetherflow unlocks Trance, Trance cycles the Demi-Egi, and all the extra buttons get consolidated down.