I believe removing Burst in favour of another ability. Or changing it all together would be the best course of action.

I already do damage and Burst just feels like a waste of time considering the output it gives.
A more useful party-beneficial ability could work better, or a potent DoT/Debuff/Enfeeble would also be great.

But all we know is, out of the thousands of BLMs. Synyster is the only one who can output decent damage with his superior setup, oh that's right, once every fifteen minutes, which in the grand scheme of things; is useless.