Hey Tim,  I never use the puffy backpacking or hiking at any temps (I hike to very cold), only in the city. I find it over-all lighter and more flexible to add that extra octa/alpha in its place because I already have the wind block from the wind shirt and rain shell.
To drop a lot of weight would be pretty painful, like moving to an UL 1 person tent, but that’s probably a non option.
Tweaky stuff:
– vapcell vs Nitecore (I get a week out of a 5000mAh bank by managing my phone carefully), a few ounces
– I ditched the second mini Bic. Ditto the ferro rod. My stove is my mini bic fall back and its really unlikely to see the lighter and stove both fail on the same trip
– I ditched extra tape (Gorilla) and rely on Tenacious Tape and if desperate, the extra Luko
– I ditched any note pad and keep notes on my phone
– no comb/mirror
– Bogler trowel (0.7 oz). Used to have the Coghlan’s as well, Bogler is better (cuts roots) and less than half the weight
– my rain system is a Sea to Summit poncho tarp, 7.4 oz all in saving ~ 6 oz with a home made shock cord belt that keeps it in place in wind. For the times I want to bring a jacket, the rain pants almost never come, only if its very cold and windy to avoid hypothermia. If I want my lower to stay dry and I’m not using a poncho, I use a 3FUL rain kilt @ 3.2 oz, pretty cheap and I love the breathability