To provide photographers with a broader perspective about mobiles, lenses and cameras, here are links to articles, reviews, and analyses of photographic equipment produced by DxOMark, renown websites, magazines or blogs.
Dxomark.com adds the Hasseblad H3DII 50 to its database, and its results coincide with those of the previously-analyzed H3DII 39. With a global DxOMark score of 78.2, the H3DII 50 ranks number 8, very close to the H3DII 39, which achieved a score of 75.3.
Professional portrait and landscape photographers often use medium-format cameras because of their superb performance under controlled lighting conditions. However, as these cameras are definitely not designed for so-called “action photography” scenarios, they generally do not perform well with respect to DxO Labs’ Low-Light ISO metric. Because of this inherent low-light limitation, medium-format cameras do not receive top marks on the DxOMark Sensor Overall Score, even though they may show outstanding performance with respect to Color Depth or Dynamic Range.
Interesting that the Hasselbald's dynamic range is worse than the one of the Nikon D800. Just yesterday I watched a video on youtube where someone compared both cameras and found that Hasselblad's dynamic rage is unbeatable.
Dynamic range is determined by the read noise and saturation capacity. The Hasselblad is very likely to have a high saturation capacity, that's why their highlights are less likely to be blown out, but you couldn't get much information from the shadows. If you underexposed the D800 and brighten it up in post, it is very likely to have more dynamic range than if you did the same to Hasselblad.
The Hasselblad is very likely to have a high saturation capacity, that's why their highlights are less likely to be blown out, but you couldn't get much information from the shadows.
Actually the Hasselblad H3DII_50 doesn't really have an unusually high "full well" or saturation capacity. It is, for example, lower than a camera with a similar pixel size that was also released in 2007: the Canon 1Ds Mark III (see http://www.sensorgen.info/). The Hasselblad also has more background noise, and a lower quantum efficiency. All-in-all the medium format sensors consistently under-perform in terms of dynamic range (especially considering that they should be able to outperform smaller sensors).
The rest of your analysis sounds sensible to me: it is easy to avoid blown highlights (for any saturation capacity) by appropriately (under)exposing. But that brings you uncomfortably close to the noise floor for scenes with dark shadows. I find it harder to judge whether or when people should care about this.