yeah, on the surface it seems like a winning idea, but when you get down to it, the result is mainly just an overload of bread. which ain't really the point of true artery-clogging artistry.
that's one of the things that is actually pretty cool about the KFC Double-Down, by comparison -- that they managed to make a "sandwich" that entirely eliminated the bread from the equation. (although i'd probably prefer the chicken filets to be a little thinner, and to have a larger amount of bacon and cheese in the middle.)
regardless, nice find!