I love all of this, but I'm not sure about your suggestion with Dissipation. From what I understand on how Dissipation is supposed to work, it's supposed to be an emergency heal button. However, the extra Aetherflow and GCD boost do not synergize with SCH due to being more oGCD based and losing a large chunk of healing otherwise, not to mention it doesn't have the GCD heals to really take advantage of it (it's one AoE GCD heal has shields attached which means it can't really be spammed). Adding another Aetherflow button doesn't really address the cooldowns of Aetherflow skills, as well as Dissipation being used as a DPS increase instead of as a healing tool like the devs intend. Now, if it was something like a single Aetherflow stack or another button like Recitation that grants a free use of an Aetherflow skill, that would be better. Honestly, if they just scrapped Dissipation and put Rouse in at 60, I don't think anyone would complain.
Side note: I really wish SCH had a shieldless Succor without needing to use Emergency Tactics, and I would like Emergency Tactics to also increase the potency of the next Adlo/Succor as well as reducing the MP cost. As it is right now, Emergency Tactics doesn't change the essential heal granted by those skills.