Joe, shifting wide angles has been the Achilles heel of MFDB with every back after the P45+. When I tested the 80mp back against the 60mp, I found the 80 to be totally unusable with my wide lenses (the Schneiders). I just couldn't get into the 32 and 40 HRs given how big, heavy and expensive they were combined with the distortion they exhibit.
I don't know, though... I'm really intrigued about this new back and I seem to find myself using smaller and smaller shifts too. It has me wondering about shooting the XF and just cropping for composition instead of shifting. For that, the 28 would be essential... is it any good? I wanna see some tests and more info about the 16bit pipeline of course, but I'm very intrigued.
CB
Chris, that is probably the one point I am most interested in and may be disappointed by. However, the new Sony's (on their A7r line) are back illuminated, giving greater lens cast response. Hopefully this is the case here.
Insofar as the 16-bit CMOS claim, I am a bit skeptical. Leica advertises that the new S2 is 16-bits, but I have a really good source who tells me it is really 14-bits amplified to 16-bits.
Leica does not source their sensors from Sony though, and considering Sony's recent track record on groundbreaking sensors, I would not be surprised if it is a true 16-bit sensor.