For the tl;dr version of this, see the wiki article on Gun Harmonisation. The suggestion essentially amounts to "put this in the game, it's been a part of aerial combat since ww2 so there's no reason why people in the 3300s should have forgotten how to do it".
Basically, it'd be a simple slider somewhere allowing you to set a focal range/point for any fixed weapons you happen to have mounted on your ship, with "infinity" as the default (ie, firing directly forward and never converging) and the minimum being however close the weapon can aim at without hitting your own ship. When you fire the weapons, they travel on a line that takes them directly through an imaginary point directly ahead of your ship at the specified range, allowing for tighter grouping with ships that otherwise have poor weapon placement provided you engage at the specified distance (likewise, engaging at the wrong range will lead to your shots going wide - if you set your lasers to converge at 600m, then at 2km you'll have trouble hitting a barn door)
Yes, this would be a massive buff for ships with notoriously bad placement for fixed weapons such as the clipper and type 10. Yes, the FDL with its already-prettty-good grouping won't see as much benefit. The sights for fixed weapons are already capable of adjusting for range, we see this whenever you get particularly close to a target and the sights move out to represent where exactly they'll hit.
Basically, it'd be a simple slider somewhere allowing you to set a focal range/point for any fixed weapons you happen to have mounted on your ship, with "infinity" as the default (ie, firing directly forward and never converging) and the minimum being however close the weapon can aim at without hitting your own ship. When you fire the weapons, they travel on a line that takes them directly through an imaginary point directly ahead of your ship at the specified range, allowing for tighter grouping with ships that otherwise have poor weapon placement provided you engage at the specified distance (likewise, engaging at the wrong range will lead to your shots going wide - if you set your lasers to converge at 600m, then at 2km you'll have trouble hitting a barn door)
Yes, this would be a massive buff for ships with notoriously bad placement for fixed weapons such as the clipper and type 10. Yes, the FDL with its already-prettty-good grouping won't see as much benefit. The sights for fixed weapons are already capable of adjusting for range, we see this whenever you get particularly close to a target and the sights move out to represent where exactly they'll hit.