According to wiki there are many features that possibly can be experimented with:
Explosion Statistics:
Hull Damage
Shield Damage
Explosion Radius
Detonation Range //Nuclear and Nomad 6m, others 4m Mine Statistics:
Lifetime //can't be too high especially combined with high refire - server issues; now: all 10s
Self Safe Time //all 4s
Seeker Range //all 400m
Top Speed
Acceleration //all 200m/s^2
Hit Points //all: 2HP Dropper Statistics:
Energy Drain
Refire Rate //all 1/s
Hit Points Cost:
Dropper Price //doesn't matter that much unless ridiculously high (see: Cheetah Thruster case)
Ammo Price
What can be made when changing those?
Super Nova Antimatter Mine: small detonation range, large explosion radius, long self safe time & seeker range, slow, low refire, powerful, long lifetime, high energy drain (so it can't be launched by fighters). High dropper price?
SPAM mine: high refire, low seeker range and explosion radius, weak, short lifetime, cheap.
Stalking mine: very low refire, very long lifetime, high seeker range & long self safe time, high price?
CD-resistant mine: pretty normal (=ripper) except for astounding amount of hitpoints and ammo price
High sensitivity mine: large detonation range and seeker range (=> long self safe time)
It's just a matter of finding cool names and balancing a bit.
Feel free to PM me regarding any grammar/spelling/other language mistakes I have made in my posts.