I can't comment about mountaineering tents, but I do like your one Shot tent a lot.

A friend has a similar cross pole design 2-person tent and it's easy to set up, and works great as a free standing tent in on our rocky terrain here.

Looks like the vents in the side panels should work pretty good to help keep it dry inside.

The advantages of the ease of set-up with that design are pretty hard to resist and the size of that one looks about perfect for solo going. The new design has an option for a vestibule, but I don't think I'd want or need it for the way I backpack.

W_D, that trips sounds amazing... It's hard to even imagine taking off, solo, into the wilderness for that long. I have never been away from family and work for that long, and beside that, I wore myself out going to the garden and back this afternoon