Nonstop would be too much, but it'd just be nice to choose between more accurate fire against a specific target or saturation fire against multiple targets in a larger area. Concentrated Fire could be slower while Saturation Fire would be faster.
The B4 has this option and it's overpowered. It's an automatic squad deleter. Once a minute bye-bye at least 1 squad, maybe more.
Why do people want arty buffed? Not enough Brit-style play? You want to fire from wayyyy back without getting shot yourself? Awesome, you are teh skills. New META = 6x Howie, more accuracy, not destroyable by offmap, good fun MVgame.