Two points to ask: 1) I've been doing IndustrialCraft 2 for a bit, Will this mess with the world if I install it late? I understand Rose Gold won't generate in chunks I've already generated (honestly, I'm not that interested in it right now). Is Rose Gold that important? Will the new ore give me ugly borders when new chunks are generated? Or does the seed have the same terrain map no matter what ores are added to the game? 2) Will my old save have their villagers changed to MCA villagers? 3) Are MCA villagers less... danger-prone than the idiots in vanilla?
Just like me, I decided to go ahead and make a backup, then try it myself. :V
Now an actual support question... I spawned in world, said I live alone, so why is it that it says I'm married when I try to propose to villagers?