It would be a nice addition if there was a rule to disable Slime Chunks (maybe even on a chunk basis)
But I dont know if something like that is even possible from a code standpoint

in addition to this

make the rule name slimeChunks, and make the options true (default; vanilla behaviour), false (no slime chunks) and all or smth (every chunk is a slime chunk)

or you could add slimeChunksDistribution, and make it a percentage of all chunks

i.e. 0 is no slime chunks, 100 is every chunk is a slime chunk, etc.

if the vanilla distribution percentage is selected, idk what it is, then the feature should be disabled therefore not changing vanilla slime chunk locations

I added slimeChunkPercentage to my extension mod now, because I ran out of own ideas

thank you! this will be very helpful for underground bases.