[Alneyan]

If you really had nothing better to do, you could always create a map with one blackhole system between "real" systems, with an unavoidable pull towards the middle. Ships would cross "hyperspace" in one turn or be destroyed, making speed very important, and from there you could tweak a lot of things to your liking.

The caveat is, of course, the amount of work needed to create the map (besides the mod, of course). Still, it might be interesting for certain concepts.