On Fey Blessing...

[SayuyuYuyu]

The problem with Dissipation is (...)

I can see what you mean - but I don't think it's quite as bad as made out to be on the pretext that as of right now, Embrace is a bit lacking.
It's easy to supplement the Fairy's lack of healing during the Dissipation window by just dropping a Sacred Soil on the MT as well as the party after the raidwide damage goes out, and maybe Lustrate extra if necessary. Maybe even hold the Sacred Soil and let Whispering Dawn (which you should have used before Dissipating) keep the Tank's health in check.

I'd say it's also worth noting that Dissipations actual biggest problem from before got fixed, in that the Fairy now resummons itself. Before you'd only ever want to Dissipate to gain Energy Drains if there was downtime available for you to resummon the Fairy, since doing so in the middle of uptime is lost DPS. Off the top of recent memory, O11S had two windows right at the start (before and during Level Checker) and UWU has one window during the transition phase of Garuda to Ifrit, and during the transition from Titan to Ultima.
Before, with proper cooldown planning it was perfectly safe to Dissipate your fairy and not feel any healing consequence of it. Since value of Embraces has dropped in 5.0 amplifies this.

Obviously you wouldn't Dissipate if you had a Seraph window coming up or an extended period of time where the only damage going out is tank auto attacks, but if you're ever going to throw out your Recitation then you're doing yourself a lot of favours by squeezing out every last drop from it that you can.