OP - so you named a really light/fragile treated down, active insulation, and the aerolite kind of tends toward more static (to me). I'd say based off of your use case the Sitka piece might fit you the best (as you said you want to both sit and move with it). For 30-50 the superdown might work well, but that's not a great place to move in, nor for waterfowling.
Atom LT - kind of between static and active insulation. Great piece. Good cut. Will not be enough for 30F out static insulation (ie glassing). Proton LT may work better for you?
Sitka and kuiu both like to cut pieces kind of short for my taste. I've had a couple versions of the kenai - it isn't a bad jacket at all, but probably not going to cut it for a static 30F out jacket. Will be awesome for on the move.
First Lite uncompahgre may be a good fit here - a bit heavier but brings some warmth. Brooks down is a really tought/light piece, but not super warm.
Would also consider this (
https://www.stoneglacier.com/collections/all-apparel/products/2022-cirque-jacket) as it seems to straddle active/static really well, balances wind performance/breathability better than the kenai has for me, seems to move moisture well, and is warmer than the sitka and kuiu pieces. BUT this is more purpose built for mountains....
I'd decide if weight, packability or flexability (ie works across larger temp gaps) rule, to help with synthetic or down. I personally use both, would trend towards sytnthetic if you're rougher on stuff/applications? Then I'd look at temps: 40F and above the lighter stuff works well, but below that, you'll want more than 80 g/m2 on insulation weight, or 2.5oz of down fill weight. If moving, a heavy fleece + kenai can get you into the 20s if you are in aggressive enough terrain. I run cold, so my feedback is also based on that.....