Just a quick comment (that also helps get it back to the top for better visibility...
).
I voted about decreasing but it was a hard vote for me. I mean, it's already built-in so why bother to take it out? Not hurting anything. But I voted that way because I spent a little time looking at all the types and a lot of them appear to be kinda similar. And I know how you use the term dense and sparse (which really requires one to "run around" comparing systems to see what the difference is).
The only thing that "bothered" me (and bear in mind I feel a bit weird about "complaining" about something free), is when you roll a lot of planets up, how often they get strung in a straight line along the edges. I suppose there's no helping it, though, or you might have changed it. Of course
, you might prefer it that way.
Anyway, it's a good gift to the community!