You are talking semantics, and not good marketing. The 5 series has a large and durable fan base. The 6D isnt that much better than the 5DII, in fact if you read the initial reactions to the 6D it was decidely mixed as many of the 6D stats were not an improvement on a 4 year old 5DII. So the 6D was not going to satisfy the 5D enthusiasts and it made no sense to abandon the 5D reputation in favor of a 3D, which has some marketing flaws due to people mistaking it for 3 dimensional capability.
Interesting that both my cameras (60D, 6D) were harshly panned when they first came out. I really like both of them. The similarity of controls makes my life easy, too.


