Problem is, really, if you start adding options here and there, why not add them all ?
If they have a nil or very low performance cost and are optional, I don't mind adding them. Why not?
If they have a high cost when disabled, I am not keen on including them in BULL.
In this case, the cost will be checking a single boolean value every time a map is generated. This cost isn't even big enough to be considered trivial, so I'm all for it.
The other things I'm hesitant to include are mods that are still going through fast revisions as it means more work for me to keep up.
If you have other suggestions for inclusion, please post links to them and I'll take a look.
Edit: One thing I need to double-check is whether or not adding game options to the Custom Game screen alters the save file format. If it does, CLS is a non-starter. It would break SGs. I'm happy of course for someone else to provide a merge of BULL + CLS for people to use--it just can't be part of BULL proper.
What I could do is make it a BUG option that would apply every time you started a new game. To turn it off, you'd have to start or load a game, turn it off, and then start your real game. A PITA to be sure, but it would allow the inclusion of CLS into BULL directly.