I'm going to try to keep this as brief as possible, lol.
I've used a Kifaru frame for about 7 years now. Currently have a DT1 and Highcamp 4800 bags. I also have a Mystery Ranch Scapegoat 25 for day use when I'm not packing meat. My Kifaru has been solid, and feels great under a big load.
The downside, however, is weight. I've been watching some of @sndmn11 , @mtwarden posts among others about their success with Seek Outside packs. I have almost always carried meat in the bag.
I didn't read your whole post as I just got back from sheep muling and am sitting on the throne.
That is all the meat from a ram and a two day camp. No horns or cape.
I will add more to my wingspan pockets review tomkrrow or the next day.