One mothership equals about 4-5 worlds related to "Derelict" theme. If you want to see more stations and less probs - tune down the number of motherships, and tune up the min/max values for "Ruins" theme.
128*4 = >300 systems I set. Oh boy.
Began to figure that was the case, probably turn up ruins to 500-1000 next time, with more Remnants. Additionally, thank you for making such a comprehensive sector customization mod. Guys like you churning out new ways to explore the sector and ruin (almost) everything are what keep me coming back to this game.
I have a feeling that you got something terrible in your settings.
You see, for it to work, your constellation count should equal the sum of all your "themed MAX" values.
So, if you, for example, have a 300 constellations count, you can set mothership number to 10, ruins min/max to 120/150 and remnant min/max to 90/100 - you will get a decent sector. Otherwise, if any values is greater or equal to constellation count, it just replaces or other themes in such way:
Derelict > Ruins > Remnant.