Taking a line from another mod, in Angels Fall First, instead of getting a thruster, they get a sort of 'gravity rudder' that lets them turn alot faster by diverting shield energy and speed.
Potentially, Battleships (and possibly some/all cruisers) could get something like this in Disco. A "thruster" that, when activated, allows the ship to turn much quicker and more aggressively, possibly at the cost of shield regeneration/engine kill/whatever balance decides. Obviously this wouldn't be too good an idea for gunboats or anything else because it'd kill their main advantages
Another idea would be to rework the capship physics completely and doing something like this
Now we're working towards real Battleship tactics!
We should have separate settings for battleships.
"Evasive maneuvers" More speed, more agility. Less regen, less damage output, less shielding.
"Aggressive stance" Less speed, less agility. More regen, more damage output, less shielding.
"Stand Ground stance" Less speed, less agility. More regen, less damage, more shielding.