-Are you sure the 1L Platy weighs the same as the 2.5L Platy? I don't believe that they do.
-Have you practiced lighting an esbit stove with a firesteel? I would switch to a mini bic and matches.
-Nix the pillow, stuff some clothes into one of your unused stuff sacks at the end of the day.
-Not sure about the JMT, but are two pads necessary for the expected conditions?
-You are carrying 9lbs of fishing gear if my math is correct. This seems excessive, what are you bringing?
-No rain gear?
-No warm gloves?
-Nearly 3oz for a 2nd pair of socks is pretty heavy– look into cheap dress or ankle socks.
How is the cooking going to work for you and two other people? How much water do you plan on boiling per day? How many stoves and pots between the three of you?
I know that I wouldn't want to boil all that water with only an alcohol or esbit stove and one .85L pot– you guys may find it more efficent switching to a cansiter set-up and one larger 2L pot for boiling water.