nothing but a re-packaged 5D II, crippled all around.
Still a tired old sensor with 2 EV less DR than any Nikon FF camera.
Still totally inadequate AF-system, only suitable to "but I only ever use the center AF-point"-shooters.
Overall even weaker than the nothing-to-write-home-about Nikon D600.
DPReview gives the 6D a lower score than the 7D. But the 6D is smaller and lighter than a 7D, while offering a sensor twice as big. And it offers great high ISO, better than the 5DII. And it offers great low-light AF, going down to -3EV.
I've shot professionally with the simple AF system of the 5D and 5D2 for years, so the simple AF system of the 6D wouldn't stop me from buying a 6D. And I've used the outer AF points many, many times. Many pros chose the 5DII despite its simple AF system, so "totally inadequate AF" is a total exaggeration. Now Canon seems to have upgraded the AF accuracy in the 6D, so it can only be better than the AF of the 5DII -