Ouch! Sorry to hear about your back, and I hope you're getting plenty of bed rest and healing well!
As for your questions:
1. Swing MIGHT work, but it depends on how high up it is.
2. There's a small hint as to what might have happened to Morgana in one of your dreams...
3. The other maps aren't split into disctricts, but they will have their own "zones" like the town does. Contested areas, areas with a special focus or something to guard or use. That kind of thing.
4. Potions will be useable in Act Three, and you'll be able to purchase ingredients for crafting (amongst other things) with them.
5. Decisions made - especially the purchasing of property and getting girls' event lines completed - will have a huge effect on Act Three. From granting or denying access to certain characters, crafting recipes, combat skills and more. Some of the girls may even turn on you...
Hope that answers your questions, and that you're feeling better! :)