Sounds like you are on the right track. I have a couple of other thoughts that I will preface by noting that I live in Oklahoma and also hunt AR, so we are in similar climes.
Something I learned from a good bit of mountaineering was to have an "action suit" (i think I stole that term from Mark Twight or Will Gadd) for moving and a "belay suit" which is usually a down puffy to pull on when you stop. It just isn't really possible to have only one kit for moving and long periods of inaction in frigid conditions. Layers are great, but you can't remain stealthy if you're constantly adding and subtracting layers. And enough layers to stay warm when it is really cold gets heavy and bulky pretty quick.
Hike in chilly, pull on a puffy, done.
Down is NOT for approaches, hiking, or brush (like wind gypsy mentioned); you pull it on when you stop. For hunting, your action suit might be layers for controlling sweat on a long approach (you must manage sweat and stay dry at all costs), or something with a durable or quiet outer layer for thick cover or briars, as the situation dictates.
Madcalfe maket a good point; I keep down in my pack almost always, except for early bow whitetail, but around here it is a down vest instead of a hooded jacket.
RE:Softshells. They are just that, soft. Aside from moderate conditions and where noise is priority one, and blocking just a little wind is number two, they are not super useful. I prefer a polartec type mid weight paired with a vest.
It is true that the quietness of puffies (like most layers) varies widely, but when it is so cold that down is required if I try to tough it out in quieter, less noisy fabrics, I end up fidgeting around because I am cold. It is also a mental challenge to stay motivated when I'm cold. Minimizing noise is super important, but so is being still and staying in the stand, so pick the quietest puffy possible. (and not shiny!)
Sadly, as long-winded as this is, it doesn't really help with your main question so I would say one of the guide style waterproof/windproof camo jackets from Sitka, Kuiu, etc might be the closest thing. My outer hardshell isn't camo (it's an Arcteryx), I just have different camo ones for turkey and waterfowl hunting. I agree that solids are fine for most hunting, but birds are a whole different ball game.
Part of my excuse for rambling on is that Wind Gypsy is right, everyone has a unique set of needs; but if we can give a range of experiences and applications, maybe you can pull from it a few nuggets that will help