Personally, I see two main uses of the mine launcher, with one I feel particularly evil.
Firstly, you could use the mines to boobytrap clouds at the start of a game- Duel at Dawn or Battle on the Dunes being good examples. This would be of great use to Sniper ships, as they would either force heavy damage or a slowing down in the enemy ship. While the practicalities of this technique have probably been argued prior to my post, I still want to try this out.
Secondly, and this is a truly dirty and contemptuous idea, is to use the wind to bombard enemies. Sounds stupid, right? Ah, but we've all played Desert Scrap, and faced the downright annoying sand storms. The idea is, as a storm rolls in, to place mines which will ride it all the way into the control point. Primarily, they'll be hard to see in the sand. Following that, nobody will be focused on shooting them down as they attempt to not crash/preserve engines/guns etc. By effectively spamming mines at this point one would make a constricted area even tighter, and the combination of this with the dust storm means any hostile ship would be a ripe target. However, I'm not sure if this is even feasible, as I need to know the speed of the mines and the correct part of the storm in which to place it. Also, I hope the mines will hit the walls if they miss, as they could get in the way as you try and hold the point.
Cheers for reading,
Wazulu