That was actually the whole idea behind the Job Gauges in the first place. They were meant to make it easier to see when certain Job-specific mechanics/buffs were active... unfortunately that kind of got lost in their execution, and just became gimmicky and ostentatious. Hence players begged SE to make them able to be minimized (or simplified), which SE added in a patch.

So in a way, they kind of already did that, but it missed the mark alas.