Played for a while
Here are my thoughts please keep in mind this is one mans opinion
1. Orbiting makes aiming hard and picking up power ups more about luck then anything
Ideas I had that might fix this is
Be able to nudge the position of the stations push further forward or back in the orbit
More realistic orbital mechanics (your orbital period is faster the closer you are to the object you are orbiting) this might make aiming easier the further out but give you more chances at shots closer in
2. Had a hard time at aiming the 2 shot variant as well because I didn't know how big the spread was
some crosshairs or the turret facing the correct way might alleviate this
3. I had some issues with the recharge I keep releasing moments too soon and would have to wait a whole orbit to try again.
A cool down timer instead of a warm up timer
A charge meter instead of a warm up timer (shot damage scales)
Or if you really like the mechanic maybe add a perfect release bonus that if your close you still get to take the shot you get a bonus either decreased energy usage or increased damage, but if you release too soon you still get to take a shot
GMTK actually did a video similar about a mechanic similar to this in gears of wars