You know, I think the criticim comes from frustration with all of the MFD options. The best still-in-production solution is likely the Rollei, but even that wonderful camera is compromised by poor availability. The DF just feels old, but the Phase/Leaf backs have the best support and arguably the best tethering and C1 workflow. The H is readily available, nice IQ, best VF of currently produced MF (The Rollei might be better or have better options, but no one has one or any accessories to check out), has best of class AF (again, the Rollei might be better), and True Focus does work reasonably well. Phocus is not great, just counter intuitive in many ways, but over all not a bad camera at all. The frustration comes from the fact that the DSLRs are so good now (yes, even the 1ds3/5d2) that shelling out the additional green for somewhat better IQ but an inferior camera is off-putting, to say the least. And by better IQ I mean 400 and below, with some exceptions such as the P65/IQ160/H4D-40, that can do an OK 800. So for the large premium for MFD over a DSLR, EVERYTHING, including the handling and usability, better be top notch.
This keys into the Italian motorcycle issue brought up by Fred: Buying a Ducati Monster 1100 EVO would be more fulfilling than buying an MFD solution instead of a D800/5D3. I have a Monster 796 and two Moto Guzzis, a V7 that I cafed out and a 72 V7 Sport. I'd much rather get radical at a track day than have a new MFD solution.
Personally, I don't thing I will buy a new back or MF camera, although the Rollei with an Aptus back is tempting. My RZ with an Aptus 75s is, to me, the best MF solution available. Cheap, great waist level, cheap, I own every lens except for the fisheye, cheap, shoots big 6x7 negs when I want it. The Fuji 680 looks nice, I passed on it in the film days because for anything where tilt and tripod was required, I shot 4x5 or 8x10, or used a 6x9 back. I feel the same way now.
All that being said, I think the H5D will be great. Its evolutionary and a world better than the H1s that all seemed to lock up on me back in 2004/2005.