Thanks, the new event system is for entire sidequests - emily&tisha, cali, ayda, etc. First step is to put the new system out and see if it bugs out for anyone.
Then anyone comfortable with looking at GDScript can see the event code all contained in one place instead of spread over random core game files.
The actual new sidequest/event modding would be done through basic human-readable .json files. I will officially add support for that to the modding folder *after* some live testing to make sure it's not horrendously breaking the game. =D