Couple things:
Uncompagre is not going away it is a very different jacket than the Chamberlain. The Uncompagre features super breathable 100gm synthetic 37.5 insulation that works well for cold active hunting. The Chamberlain is based on 8000 meter type jackets. Very very warm but under 2 pounds. the goal was to make a jacket that was as warm as possible for glassing that is highly packable and light so it easily goes into your pack when you begin your stalk.
we are offering the Hallstead with a hood and without.
If any thing we are using more products with 37.5 tech. many more. The soft shell, two weights of aero wool, the down blend just to name a few.
As of late last year the Obsidions now feature a little spandex giving them stretch and durability by virtue of taking strain off of high stress seams.
Sorry no zip off bottoms this summer, but after reading this it is something we will build and test. One question. To me it seems a little weird to make them out of such warm merino. It would seem if you were on the fence between wearing LJ's or not you would want a thiner pair to start then be able to take them off as it warmed up or you has to put in a hard effort.
I hope this helps. thanks-Kenton