Though unintentional, the idea of having underground lakes scattered around is a unique idea on it's own. To work upon this, I should look at making those lakes much larger in size, allowing me to reduce the generation of the magma lakes, and perhaps have something unique to those lakes, like rare minerals (whatever that means), or perhaps a new kind of decorative block because why not.

The next question is to figure out what determines the size of lakes, and whether it should have more headroom than magma or equal amounts, and perhaps if I can add some special features to them.

I think I got something good out of this. Closing.