Thank you for the feedback! It's going to be updated every 2 months, you can check out out my public thank you post on patreon or subscribestar for a detailed update on my plans for the next update but a rough tldr: Intro to free roam and swapping between characters freely, New main story content for both main characters, side corruption story line starting with various characters already introduced, recollection room added. I don't want to promise specifics on amounts of content as this is my first release cycle and I it will be a good judge for me to see how much I can reasonably output every 2 months so I can then give more accurate plans for future updates.
As for the questbook, I do already have a quest system setup for after the prologue, but thought it was overkill to add into the prologue due it being much more linear, but given how open it will be after and with many corruption storylines available, there will be much more use for one next update.