mines and star bases: C and C
starbases and mnes are good units in the game, but the former are too numerous IMHO and the latter are broken.
Mines have too many HP. Given that theyr'e a large explosive, they should fall to fire a bit faster. Rather than 200 HP, I suggest something in the 60 or so range. Mine placement should also take tactical slots. Originally, I thought 1. Now I think 2. Up the number to 15 mines placed and require 2 tactical slots IMHO. Too many is very difficult to sweep. SHip controls are such that you cannot stop them from moving into the field, even if you want to, they tend to loop around and go again. Resolving this would require extensive coding on the part of how ships approach mines and other vessels when attacking. Probably not worth that effort.
Star bases are fantastic. Nice concept. As are the hangar/gun upgrades. Very nice. Right now star bases IMHO can theoretically be fielded until you run out of ship slots, and it's easy to field one per planet, even in large games while having large fleets. I recommend the heavy constructor have an absolute maximum, or otherwise have a higher supply. 10 is too low. A basic starbase is about as tough as a cap ship, so I recommend increasing cost of the constructor to something similar, and rquire it to be built from the cap facility.
Nice work overall. Just focusing on the perceived defects. It's a good expansion.