Really interesting discussion.
I also think that you can have too much of a good thing.
My Sony A7r files are processed in C1 with a black point at +7 as a starting point. With other settings to balance this effect I find the files a bit closer to the S2/medium format look.
The flatness of the medium tones of the D800 was the main reason I’ve sold it.
The A7r I think is better in that regard but still doesn’t come close to the S2 in overall presence.
From some users comments I was expecting some issue with the reduced DR of the S2 but, after 3 months of use, I’m convinced it’s a key element in the wonderful way it renders light.