Upload & Sell: Off
You won't find anyone making lower contrast lenses anytime soon, quite the contrary, they know each new gen of sensors will only have greater DR, not less. But, for a given DR your point is taken, and isn't that part of the charm of older lenses?
Weight is another factor - CZ say 830g for the ZF.2; Overgaard quotes 685 grams for the Leica, much lighter whichever way it goes, most fast 35mms are ~600 grams.
I understand that the high contrast look makes a lens look sharper, and thus sells lenses, but I don't see the point of gaining DR with one hand while throwing it away with the other. Leica has always gone their own way here, and I do appreciate it. There is a delicateness to the Leica results which is missing in the Zeiss photos.
The Leica weighs 703g on my kitchen scale, with both caps (the bottom cap being a Zeiss cap!). The Zeiss weighs 897g, so you are right, the Zeiss is a fair amount heavier. It didn't feel that way in the hand, since the Zeiss is so much more voluminous. The Leica feels a bit denser.
Here are another two bonus shots, made with my one studio light and a reflector for an upcoming eBay auction, Leica first. This is at f/16 and f/11, respectively. I don't see much difference at this point, other than the extra wideness of the Leica, but the Leica is a little sharper, and still carries a bit more depth of field. Thus the second shot is sharp front-to-back with the Leica, but not quite with the Zeiss.