As a big carbuncle lover (when I first played I actually refused to be SMN during solo play like questing because there were no egi-glamours back then and no way to undo an upgrade. I was doing all of my MSQ as ACN), I think the best solution is to:

New egi glamour called "Custom Egi". Then a new skill that opens up a menu where we can change its color to any RGB we want (and size?) and pick one of the 3 skill sets available!