In case you didn't know, traditionally people post their gear lists to have them critiqued. So don't take any of this personally. "You asked for it", per se. :o)
Three different fire-starters seems excessive (rod & striker, flint & steel, magnifying glass). How about a Mini-bic and MAYBE the fire rod as a backup?
Why both a backpack and a buttpack? If you can get your base weight down a bit you won't have to "base camp" and leave most of your stuff at your camp, so you won't need the buttpack as a day pack.
Do you really beat up your hands so much that you need leather gloves? Just some wool gloves and maybe a shell for bad weather would probably work.
I'd have to know what kinds of conditions you're targeting before I can intelligently critique your sleeping bag. Likewise, what is the length of time that 1.8kg of food is supposed to last you? (2 pounds a day is a decent target.)
Why the space blanket? You have a sleeping bag. Have you ever really needed it? I might carry one day-hiking when I don't want to carry a sleeping bag, but not if I just use the bag.
A 15-oz (ish) sleeping pad sounds like a full-length ThermaRest. Depending upon conditions you could change to a closed-cell foam pad, cut to less than full length. (There are reasonable MilSurp ones available.)
I'm assuming that photography is your thing, and that you count that weight as your "luxury item." If not, brother, get a lighter camera.
Is your canteen MilSurp, too? Why do you need a canteen cover? There are much lighter water containers. Heck, just an empty PET soda bottle will work, and weighs 1/5th of what a Nalgene bottle weighs. Or, the flexible bottles or hydration bladders are very light for their volume. Evernew makes decent (non-fanatical) ones.
Can you break your clothing out by item? That would help us. Likewise what kind of headlamp is it and how much does it weigh? What is in your first aid and repair kits? What kind of compass? Is your cup a canteen cup? I don't know how much those weigh (if I weren't lazy I'd go weigh one of mine) but they seem terribly over built to me. If you really like the whole canteen cup idea there are light titanium pots made to fit over Nalgene bottles (though the bottles themselves are heavy, as I mentioned). Vargo and MLD make models that come to mind.
Basically, break out your whole PSK by individual item with weights, if you can.
In case you can't tell, we tend to obsess over minutiae, here.
I'm impressed that you make a lot of stuff as you need it. It looks like your emphasis is on "basic" rather than "light", though, and your pack just got reasonably light as a side-effect. All the more power to you! HYOH.
And, I suppose re-using all the MilSurp stuff is pretty green, eh?