My pack takes place primarily in the Nether and I'd like this Mod to use there.
That being said it's obvious that the World Gen you used for the Overworld, is not possible for the Nether.
My thoughts for it were to have some kind of RailSystem running on the top floor of the Nether and "Reverted Houses" so that the Houses dont have their next floor above but beneath(instead of from bottom to top --> top to bottom) with some holes to fall through.