My suggestion is to do away with this system entirely. It is residue from XI's antiquated subjob system, and it's time to stop trying to rework what isn't going to work. The start of 4.0 was a major identity crisis for a lot of jobs, and remains so to this day thanks to this system. We just deal with it.

PLD/GLAs had provoke as an innate skill. Cool! Give WARs and DRKs something that do the exact same thing with unique names and animations... War Cry and Sinful Gaze for example. Even though they do the same thing, they still make the jobs FEEL unique, and that is the point.

I'd rather them fix our current nonsense than change current role skills or add additional ones.