Awwww this is so tempting man! PURE magic! I'm literally on the verge of doing this myself (but with EE3 also). You added RP and XY just for the worldgen right?
Yeah. I kinda like using xycraft blocks as floors and ceilings. Mobs don't spawn on them.
RP is just for sickles, canvas bags, marble, basalt and gems. No machines.