I think it is a very nice design. Allows sitting up, shared bedding, no entry/pole conflict. Good competitor for anything in the mainstream backpacking world.
Full mesh is not a waste. Here is a quick and dirty explanation with made up numbers:
Outer tent is pitched with a 4" gap from the ground and the perimeter of a 6.5'x4.5' tent is 264", giving the gap an area of 1056sqin. If you replace that gap with an attached mesh skirt of the same area with a permeability of .5 the area of the air gap becomes 528sqin., a large reduction. If instead you inset a full mesh inner 4" from the outer, so long as the mesh area is well above 2112sqin., air flow to the occupant is mostly unaffected and air flow to the underside of the canopy is unaffected.