In it's first outing, I found the mesh insert sagged a considerable amount into the living space of the mid. I'm 6' and using the insert my feet and head are brushing the mesh insert, which is a little annoying for having so much usable space under the mid alone. When pitched w/o the insert, I'm free and clear under the mid2 with plenty of free space above head and below feet.
4 clips, loops or other means to attach the mesh insert to inside of mid at about the guy-line height would probably improve the mesh structure and improve space inside the insert.
I would love to see an option with the tub only, providing water and draft protection for the mid2, while likely significantly reducing the bulk or the insert. Even contemplating just cutting the mesh off the tub, as the tarp attachments are on the tub it might allow tub walls to stand even more vertically alone than they do with mesh.