Seems feasible. Is there a down side?
Of course. There's an up side too. However, when the two sides end up facing the wrong way - with the down side facing up, and the up side facing down, after landing - then, there's bound to be some serious re-examination of the design.
I fail to see where there any of the required substantial or outstanding advances in aeronautical design, materials, or technology, that would make this "new design" a winner, are present here.