Another vote here for the Firelight 550ml (2.0 oz) or similar 2-cup Ti pot.
If you decide to do the Colorado Trail or CDT, you might want more warmth/dryness on your legs, at least rain pants. You can expect freezing temps and snow any month of the year. If you do the PCT, you'll want rain pants in WA. Even if it isn't raining, you'll be hiking through lots of wet brush. Long pants help keep off the bugs and stinging nettles.
The umbrella is fine for vertical rain, but useless if the wind is blowing, which generally happens in Rocky Mtn. thunderstorms. The northern portions of the PCT tend to be brushy and not suited to umbrellas. It would be useful as a sunshade in the desert portions, though. I can't speak to the AT, but for the other trails use it for the southern desert sections and then send it home.
Out west, you won't get much, if any, reception on that iphone outside of towns. If it's also your camera, though, it's half the weight of mine! How are you planning to recharge it?
For the pack, if you expect to hike the PCT at some point, make sure there's room in it for a bear canister, required in parts of the Sierra.
The luxury weight could be cut in half or more. I had an old, ratty pocket Bible that I cut into sections; I take the sections I'm reading at the moment in a ziplock sandwich bag for less than 1 oz. You could do the same and change sections when you resupply. I asked my pastor about this before I did it, and he pointed out that the physical book is not sacred, it's the Word it contains. The same is true with your notebook--carry just sections, not the whole notebook. This will save you 3 oz. on each!
Cut the bar of soap in 4 pieces, sending the other 3 ahead--save another 1.5 oz. You can probably save similarly by taking only the amount of toiletries needed for 1 or 2 stretches between resupply. Consider baking soda instead of toothpaste--lighter, dentist recommended, multiple uses (deodorant, paste for bites/stings).