While I agree that it is not as bad as the 3.0 Dark Knight Darkside Aura issue, i felt like the current situation with Warriors BG Aura is quite similar.
The aura during combat is fine really, but when you are outside of combat and talk to NPCs, your aura persists, due to BG not falling off after a time. I find that its an eyesore outside of combat.
Before 5.0, you were able to "turn off" your aura by simply turning off your stance, and then turning it on again, getting rid of your gauge. This of course is not possible today, you need to either move to a different area or change classes once to get rid of the effect.
This, imho, cannot be the solution, so I propose that a Warriors BG Aura disappears when using simple or no animation in your battle effects settings.