I lived in Gilroy ( south of San Jose ) about 7 years ago when the effects of El Niño were particularly bad. Houses were sliding down the hills.
I am personally very fond of wool, it is very adaptable and is quite odor resistant compared to other fabrics. I use the ultralight cycling socks from Smartwool. They weight 1.4 oz in size large. I take 2 pair. One to hike in, the other to sleep in. On longer trips I will alternate my socks every other night, washing the ones I hiked in. For sleeping in colder weather the Possum Down socks are sure tempting, though I haven't used them. Smartwool also makes heavier socks that I wear in the winter here in Colorado. May I recomend a wool Zip-T instead of the tank top undershirt and polyester shirt? It might even save you from having to bring a Thermal top if your insulation is good enough. I am not familiar with the Mec jacket.
It was many years ago but, I used a 3 mil clear plastic tarp on an 8 day trip in the Uintas in Utah. It worked, but condensation, noise, and privacy can be a problem.
I noticed on your list a pot, cup and bowl. I use a 28 fluid oz titanium pot (3 oz) for all three if it is just me and I am cooking. If there are others I also bring an Orikaso bowl (1.1 oz) or just the Orikaso bowl if I am not cooking. The Orikaso bowl is amazing. Its a bowl, a cup, a plate, and you can lick it clean.
Is your quilt the No Snivler? I just got 1 for Christmas and won one in a drawing (thanks Jack and Jack!) and can't wait to try them. My No Snivler Long weights 22 oz. Let me know how yours works.
It is not a must, but a bivy would be great under a tarp with a quilt. Some sort of soap or hand sanitizer is good, especially if you are cooking. I didn't see toilette paper or wet wipes. I like to carry a backup Photon light.
I have been lurking here for months. I hope you don't mind my coming out, as it were, with your post.