Frankly, as you are touring is a first world region, there is probably no need to sweat the details that much -- whatever is missing can probably be purchased on the road, whatever is useless can be discarded or mailed back.

As weight is largely overrated, I would suggest that you want to err on the too-much-stuff side. You'll learn to get rid of unnecessary items in due time.

1. I would draw your attention to the bear canister, though -- it is mandated in several national parks. See here to find out what REI has to say about this. Even if you were to avoid National Parks, you might want to ask yourself why the NPS requires bear-proof canister rather than merely throwing a bag over a branch (bears are good climbers).

2. You plan to pack flannel Ts and pants. If by flannel you actually mean brushed cotton, I would bet that you'll come to regret your decision. Cotton is arguably one of the worst fabric for outdoor activities. (It weighs a ton once wet, and takes forever to dry). Synthetics or merino (I personally prefer the latter -- more comfortable and not as likely to smell (not so) funny).

3. If you can figure a way to ride without a computer, you'll save weight and, more importantly, worry less about theft/damages (shocks, water, etc). A fairly cheap tablet gets you a long way on the road to connected living.

4. Some people like to navigate with the help of the sun and stars (and the occasional road sign). I can't help but rely on a dedicated GPS. I would forget maps downloaded to a smartphone as a primary nav tool (unless you can positively recharge it every single day, or are comfortable with the occasional low-tech navigation). Bike GPS also has to be recharged every day, but if/when you run out of battery power, you still have your smartphone somewhere in your kit, and can use it in an emergency. (it means GPS + downloaded maps to your phone + tablet).

5. Somewhere among the comments, someone has suggested getting rid of the mug/bowl -- I would not. You want a pot/kettle to "cook" (boil water added to whatever you'll eat) and something else to drink tea or coffee. If you want to keep weight to an absolute minimum, look at the seppou insulated titanium mugs. Will keep your luggage light, as well as your wallet

have fun. should be great.