I think this is something that will definitely need to be done to get away from buff stacking metas like the game has had since forever (this isn't an EW 2min meta new thing at all, before it was Trick Attack). Jobs that aren't especially buffers in nature like MNK, DRG, etc, don't need those buffs. They're just a button that's there to press on cooldown.
Buffers like BRD and DNC however need to keep them, be valued for them, and also have more involved mechanics around them beyond pressing them on cooldown (Foe Requiem was the goat).
For example in pvp you have a select amount of buffers, and those are SCH and BRD only (DNC only buffs one person with more tools). It works well enough because this prevents buff stacking to break the balance outright.

On the other hand it goes without saying that removing this for half the job roster will remove one of the two remaining team based battle mechanics (the other being healing/mitigation), and this will show that the current pve model is desperately in need of more systems that prevent us from just playing a solo game with 7 players you never interact with since everything is about standing in the right spot individually.