Suggestion: automatic Z - axis construction via "formations"
Apply a formation function to tactical structures to give the player better control of how they are built. Building a small "wall" of turrets to better help a player navigate around them so you have fewer instances of capital ships getting stuck on a turret(a very lame thing to watch..).
Any actual capital ship would have a prescribed flight plan out of a tight nest of buildings, and would coordinate with the rest of the fleet. While I don't see the pathing AI upgraded to this level of intelligence, I am suggesting that buildings have more order to them so that they can be placed more easily and sensibly within tight formations. This primarily helps capitals defending their structures from being sniped easily because they cannot leave the confines of their tight nest of defenses(when they should, space is 3d...this is ridiculous). Better building placement would alleviate this to some degree.
Yes i know the buildings already construct slightly in the Z-axis to some small degree, but finer placement options should be available.