If you think firing arc doesn't matter at all, maybe you should duel some of the better tac cruisers out there and see how fast they burn you down while you try to zip around them
Not that it doesn't matter, but that it's broken. Weapons continue to fire outside their arcs.
The weapon only checks if the target's in the arc at the beginning of the cycle - remaining shots will continue to fire regardless of the arc. Doesn't check per shot. You can fire fore 45 arc weapons as if they're aft as long as the target was in the fore 45 arc when you initially fired.