The 6D sounds like a great camera and that is a great review, but I prefer the 5D3 for the AF points, larger body, dual cards, multi controller joystick (especially on the grip) and most ergonomics in general.
As far as the center focal point, I can't remember the last time I used the center focal point. The 5D3 with all the those cross types spread out is really sweet.
There's really only one thing I'm envious of on the 6D and that is built in wifi. I have to use and Eye-Fi card for that.
I've never really run into a situation where the 1/2 DR would have made a difference. Therefore the banding issues of the 5D3 aren't an issue either. During test I do know the banding is considerably better than the 5D2.