Suggestions for extra additions

I would consider some sort of integration with Minecolonies or Millenaire (more likely Minecolonies as it's easier to use) during the 1st/2nd age. Also perhaps an alternate version with Minefantasy (if they ever successfully update to 1.12) Having interactions with NPCs would just generally be nice, as I feel that the real appeal after a certain point in advancing technology would be getting more done with less work, and to do that you would want NPCs that can do that work for you. Maybe even have AI run rival kingdoms that will advance with technology at a (relatively) steady pace, of course much later, as eveb minecolonies does not yet have ai run towns.