You are pretty happy with the weight, that is good. Since you posted the list, then I guess you are looking for feedback. Nice list overall.
Obviously your biggest gain would be with the three more expensive items... back, bag and shelter.
I know you have been looking at packs so that has been discussed previously. Also you have been looking at tarps/bivys. I never sleep in a shelter unless it is going to rain or snow. Your bag is already light, but there is a question as too how warm it really is.
So lets look at some of the other stuff.
Stove/cookware - okay. You could save a little here, but nothing wrong with what you have.
First aid could be pared down. Mine is pretty minimal now, since I have never needed most of what I have packed in the past.
Headlamp, unless you hike in the dark, a Photon is great at .3 oz. These little things are awesome. I give them away at Christmas as gifts to non-BPers.
GPS - I think they are pretty useless for what we do if you are good with a map & compass, which you are already carrying. My wife got me one as a gift a couple years ago. She "complained" when I didn't take it on our day hikes. Then I started using it on our hikes as a curiosity. We have fun with it on these hikes now, but I leave at home for my BP trips.
Body wipes/deoderant - nix.
Water purifier - nix. I have used iodine tablets for 40 years. I just "discovered" aqua mira.
Snake bite kit - nix. If it is a 'cut and suck' kit, double nix. I live in the desert and don't take one. If you did everything right with one after a bite, you probably won't get much venom out anyway.
Leatherman - nix. Get a Swiss arm classic at .8 oz for long trips. I wear mine on a lanyard. It is great to use the scissors for triming and filing finger and toe nails (won't do the big toes though). A folding razor blade for short trips.
You could get a much lighter camera, but if you like the one you have... keep it.
Clothes, from you avatar, you look like a big guy so your clothes are going to weight a lot more than mine. :)
Nice list overall.