Hey, thanks for playing! I can give you some info on these.
- Each level of morale (ranging from super unhappy, unhappy, normal, happy, and very happy) grants a bonus (or penalty if bad morale) of +2 Attack and +1 Defense. So someone who has had their morale raised twice has +4 Attack and +2 Defense.
- Those are empty passive slots. You'll figure them out once you start playing around with passives.
- I'm afraid there is no item quickslotting. Those slots are all for abilities.
- The game creates up to 3 autosaves, never any more than that. If you let it do its thing it'll only create 3 slots worth of clutter, which is hopefully not too much. : )
Let me know if you have any other questions!