Hiya :) Welcome to CK, and thanks for your support! HHG is a great game, and the dev actually started out in my server, so that's a fun coincidence!
As to your questions:
1. There's still another year at the least, and two at the most, to go. Act Three is the final act, but there will be an epilogue afterwards (then two sequels planned!)
2. More anal is on my "to-do" list as it's a popular request. Feet stuff not so much, I'm afraid, as I already get complaints for the little that's in there :P
3. Yes, the next version will drop in two weeks, as detailed in the latest devlog ( https://thearcadean.itch.io/corrupted-kingdoms/devlog/486820/the-people-have-spo... ). The new systems proved to be a lot more involved than initially planned!
4. I've actually never even thought about or considered a JOI system in CK... it certainly has possibilities, but those videos usually last upwards of fifteen minutes and I'm not sure I could write out a fifteen-minute-long h-event ;)
Hope that answers all your questions, but if not, or if you need clarification, ask away!