I'll add my thoughts:
If you want a 66" long pad, replace your 4-season NeoAir with the 3-season Women's Neoair. 340 grams vs 500 grams. If you want full comfort, with the weight saved carry a 25-50 gram piece of GossamerGear 1/8" thinsulite pad, which you can use under your butt when you're sitting on uncomfortable rocks. If you want to optimize for saving weight, get a short NeoAir instead of the 66" NeoAir, and put the GG pad under your feet.
Replace the Granite Gear compression sack with a cuben stuff sack. Super easy to make your own, material from zpacks.com. ~20 grams vs 115 grams.
Replace the Gravity filter with Aqua Mira. ~80 grams vs 230 grams, and you don't have to spend time hunkered down next to a stream.
Replace the Platy 3L hoser system with a soda bottle. ~50 grams vs 115 grams
Socks? That's very personal, but I've been wearing 42 gram Darn Tough Merino Quarter Mesh socks for a decade now, in all weather down to about 30 degrees, and I haven't had a blister in at least a decade. If you haven't yet tried the switch to a single thin sock instead of traditional heavy sock + liner you might want to give it a try. I carry 2 spare pairs, for 84 grams, compared to your 185 grams for one spare set.
Crocs Classic? Do you need spare shoes at all? I only carry spare shoes for hikes where I know my feet will be wet all day (i.e. Scotland or Wales). If you want spare shoes, the Crocs Cleo model or the Vivobarefoot Ultra Pure weight ~200 grams (depends on size) instead of your 290 grams, and both of those models are more compact. The Vivobarefoot Ultra Pure also stay on your feet if you wear them across rivers, unlike the Crocs.
Leather Gloves? Hard for me to imagine how long it takes to dry them when they get wet. But sounds like you've used leather gloves and have found a solution to that problem. Personally, I'm very happy with the weight, durability, and warmth of the OR Flurry Mitts. 55 grams vs 155 grams. And for really wet destinations add a waterproof overmitt like the MLD mitts or the TerraNova Extremities TuffBags.
Petzl eLite weighs 1 oz and is more than enough for summer hiking when the days are long. The Fenix LD01 flashlight weighs one oz and is bright as heck if you want a bright flashlight instead.
75 grams of Vaseline soaked cotton balls? We carry some Body Glide in a little pill container. 8 grams vs 75 grams.
85 grams Leukotape? Wrap a foot or two of it around your chapstick or pencil.
Agree with others - drop the trowel and use a rock or stick or heel of your shoe.
I'm a quilt person. But that's a personal thing and it sounds like you've already ruled it out.