Sky, the problem in the 'Proximity Mine', imho, is that it would be a cheap weapon, as the swarm launcher is, unless the damage of that mine would be something in the lines of 1500 - 2000 shield damage and 3000 - 4000 hull damage and those are quite high values, the range is simply too much, even for that, very cheap weapon.
A Cruise Disruptor Mine sounds interesting, though, I think it was suggested before, but again, I'm in favor of such a thing.
Frigates are pretty much unhittable as they are now, both of them, due to hitbox issues. I think they should have less firepower than the cruisers if Igiss makes them more maneuverable (as I say, the unhittability issue).
I also went and tested against the Talarca: it does appear to have some issues with the hitbox. Pretty much same problem as the Nomad Cruiser. It takes normal damage only if hit in the centre, a little off and the shot misses.
The Kiith and Kushan ships are too fast/maneuverable and also have too much firepower.
If the stars should appear one night in a thousand years, how would men believe and adore and preserve for many generations the remembrance of the city of God? - from 'Nightfall' by I. Asimov The Outcasts consider Siniestre Nube a sacred place for several reasons. Early explorers discovered a jumphole within the depths of the cloud that leads to a strange world of ringed stars and strange craft. All ships in the burrial ground are placed facing that hole to honor the Alien Spirits. - An Outcast rumor