I'm sure you are well aware of the difficulty some players have with obtaining Atma for their Relic upgrade. This is getting increasingly difficult because most players have already finished this phase of their Relic upgrade and have moved on, leaving the last unlucky few (as well as new players) to tackle FATEs mostly on their own. The process is much lenghtier than it used to be due to lack of participants.
I'm aware that increasing drop rates for Atmas in FATEs might produce situations where luckier players would accumulate Atmas beyond what they need, but this is where my suggestion comes in:
Increase the drop rate for Atmas but also make them Desynthable at a high level (70-90). Use this to solve another problem: the ridiculous amount of Fieldcraft III Demimateria required to upgrade crafting and gathering tools to Supra (10 per tool? seriously? Mastercraft Demimateria are easier to obtain and you only need 3 per tool).
Excess Atmas could be Desynthed by any crafting class (or select crafting class if you prefer), and could yield Crystals and Clusters most of the time, and on rare occasion Fieldcraft III Demimateria, which are too rare and costly for most players.
This would *slightly* ease the demand for both Atmas and Fieldcraft III Demimateria, while still keeping the means to obtain Demimateria confined to Desynthesis, and it would get players back in FATEs again.