1. All your food in a qt bag? why? Is it food you like? A couple of my friends take 4 power bars and a Mtn House meal per day. To me that's no way to live. Just make sure you like your food.
2. a single 2-L bottle maybe very cumbersome to fill.
3. Rain gear, cold weather gear?
5. I like 2 extra, esp when your 1st pair doesn't dry out fast due to cold/humidity.
9. Stove, utensils?
My experience w/ Coleman bags are they are usually too heavy and/or not compressible enough to backpack with. YMMV. I have a Tru Temp 20 from Coleman I like for car camping, but it won't compress enough to fit my pack either, so I found a used EMS LT 20 bag on eBay.