Here are a few suggestions of things I didn't find in-game and assume aren't there (yet):
1) A hotkey to align the turret with the direction the ship is facing
I personally like to turretgun during bomber runs, I get much fun out of it for some reason. However during flight I always end up looking at the direction the stars are going and then move my turret accordingly until I reach the heading indicator, so my first suggestion would be:
2) Base-turrets
While I was busy thinking about enhancements for turreting, I also figured Base-turrets would be an awesome idea. Some bases might have turrets, either 1 or several one in different locations (say: one on top and one on the bottom) and when a station is under attack, you might choose which turret you'd like to fire from and from that point on I figured a hotkey to change turrets would also be an idea. If that button was pressed while the other turret is occupied it could send an order/request to change turrets, which the other can accept with insert.
3) Setting multiple waypoints
I've tried using shift-click etc and I've asked for it ingame, but according to people, multiple waypoints are not an option. It would be a nice feature however, to be able to set multiple waypoints for yourself or even for miners to make sure they don't go through enemy territory.