Explain me what's wrong in actual fast shot?
Or what's wrong in making it only for small guns even if you want to nerf bg?
Because if you're going to burst your whole character life it's not trait?
Why do you need ability to aim if you use minigun? It's a waste, fast shot removes this ability, so you lose nothing, but -1 AP to shoot.
The only problem, that unaimed single shots in RT is useless, and can be used only in TB normally.
I mean in TB you can use 14mm pistol as 14mm SMG with fast shot and BRoF, shooting 2 AP per shot, making it single-shot-like burst so every bullet hits target not fly in cone, so its the same if you burst in point blank from 14mm SMG.
In RT you'll need to persuade your enemy to wait and don't move from your FoV and not burst you, and if he'll agree, then you may click on him many time and wait till animation of shooting like x6 x7 times in a row, and only then say to him, that he can move or kill you, if he is still alive.