@Macintosh just keep preaching. I have been voicing the exact same argument for several years now. As much as I want to disagree with
@KyleR1985 about the need for what you and I want, I think he is right that the market size is too small for an industry player to take on. I am in the south and seldom have the conditions to hunt much in sub freezing weather but we still have cold conditions when you pile a truck full of humidity on to temps in the 30's. There is a pack solution that I think is the optimum design for mobile whitetail hunters but as you already mentioned, no one makes it. At least not commercially yet. A good bit of the gear I use is stuff I have heavily modified to fit what I want because no one makes what I want. I have tried to have conversations with multiple Mfg's regarding saddle platforms and small stand designs and all have had less than zero interest in discussing the why or how to change the thinking. I attribute that to many of these folks being a good bit younger which means they didnt have to grow through Baker stand years to where we are now. The other issue is most are not really trying to innovate, they are just making minor tweaks on copies of the same ol thing, mostly to cut weight.
Clothing wise, I like what Asio is doing. Joe and his team are at least working at making warm and quiet whitetail gear that isnt grossly heavy. There are some design concepts that I would love to see included but arent yet. Pack wise, imo, what is needed would be built around a lumbar pack system but with a modular, removeable frame. That obviously does not exist. Yet. But there might be something you could try in the next season or two.