Also they're kind of stuck as far as FS potency goes. It has to be stronger than Despair otherwise what's even the point of having a level 100 capstone, but also they cannot really increase it's potency all that much.
No idea as to what the limit would be but increasing FS's potency could eventually open the door to double Flare->FS lines, and I think we all witnessed the war they're waging on any lines that aren't strictly standard Fire IVs...
So yeah if they do listen again to people's complaints, I'm curious about what they'll do with FS. The spell itself and Astral Souls need a complete overhaul...