So the vanilla drill turret hits only has hard as a T2 hand-held driller. A single player can mine by hand, or take a HV with 6 drills and do some serious excavation.
Yet, a player controlling a drill has nearly no bonus. You are a tiny bit safer, but a drone can dig better, with better range and control.
Suggestion: boost the required resources for HV drill turrets to be equivalent to 6 fixed drills. Boost the damage as well, to the same amount.
This will allow players to use either a drill turret OR fixed drills. With the added bonus that it will be easier to nail asteroids in water without tilting, or asteroids below terrain with a bit more finesse. And it’s not OP, since anyone can just stick 6 fixed drills on another HV anyway.