1. Fixed
2. No it wasn't intended. I might implement this when I get around to improving the UI next time.
3. Done.
4. I might rework it to get displayed like Combo at some point.
5. Intended.
6. They've been tweaked to make more sense.
7. Fixed.
8. General merchant sells some weapons and there's also a hidden merchant.
9. Dunno, someone mentioned it can be sold as food.
10. No plans at the moment. Might happen at some point.
11. Fixed.
12. Quanitity from quality thing was briefly discussed here:
http://underrail.com/forums/index.php?topic=946.msg5275#msg5275. What I did do though is increase the amount of bear traps and caltrops that are created when not using poison to 10 and also reduced the cost of metal plates.
13. 14. I might implement this when I get around to improving the UI next time.
15. Eh, I probably had a good reason for leaving it at 21
16. As epeli suggested, it reduces cost where it can be applied (such as weapons) or it increases capacity where former is not possible (energy shields).
17. Tranquility has been reworked and now reduces AP so it won't be affecting Force Emission which is an on-hit effect.