Blah blah abusing in game glitches are bad... but Dissipation is a very situational skill. You would use it during long animations times and anywhere else that wouldnt cause a severe trade off for healing.
When you use the skill you are sacrificing an ai that can react quickly or be under your control for 30+ seconds, swiftcast or multiple gcds to hard cast. You do get MP back but your coheal probably just ends up losing it.
With the glitched way, You get a free fairy swap (2 stacks = same mp) + healing buff (not that it really effects the ability) + 3 stacks to manipulate as you please.
The fact that this skill encouraged quick fairy swaps is what made me love it. You are sacrificing swiftcast and a gcd as a tradeoff but it's worth it.
I think they should carry this over into stormblood and just change it slightly.
Dissipation: Upon execution you gain 3 Aetherflow stacks and your fairy is sent away. Healing done while under the effect of dissipation is increased by 20%.
Your next summon or summon II is instant cast. When summon or summon II is cast, the effect of dissipation ends.
It's not Broken. It's on a 180 second cool down. The healing buff is very meh. The MP cost is very real and it still costs you a gcd to use.
I got the taste of the good life and I think Scholar has sooo much more flavor with it.
[If they wanna make the skill really interesting they would add a critical rate buff instead of healing buff, causing you to balance healing from fairy and extra dps from the crit, but the fairy swap is what i really want to see.]