My biggest complaint about mines is that they all say they are cloaked, or out-of-phase. And yet you can still see them, but nothing will attack them until a scout checks them out, specifically with the ability "decloak mines". To me this would mean that you cannot judge their placement or amount until you use said ability. So make them invisible fer crying out loud. If i jump into a planet without good enough recon and the place is filled with mines I cant see and I have made no plans for them, let me get chewed up. because as it stands, i can scout, se that there are a lot of them but they are all on the right side of the GW and I can just jump in from a little to the left of the phase lane. Avoidance should only be part of it. I realize this makes the game MUCh harder if we don't have minesweepers or a minesweeping ability. Unless we make the mines attackable, we shouldnt be able to see them until a decloak is used on them.
my second biggest complaint about mine is that they deploy too few at a time, with too low a limit. Decrease the dmg done per mine, but increase the number of mines per deployment and maximum number of mines per GW. Then it might be an actual defense instead of a "oh noes! i lost a ship that was already super duper damaged and was turning the wrong way when i wasnt paying attention." presently mines are a lot like trees on the side of the road, the only way they are going to hurt you is if something else has already gone really wrong.