Hmmm, hate to say it out loud ... but everything you have brought up is completely or partially solved with a H4D/40 ... which I have used to shoot wedding stuff with in gloomy Michigan's Lake effect, English like environment ... and portrait/fashion/commercial in studio with strobes.
Extraordinary full resolution ISO 800, and excellent 1600 without pixel binning.
True Focus APL effectively eliminating the need for AF points all over the viewfinder, even the ability to accurately focus at the far edge of the frame and recompose.
HC100/2.2 AF lens with an equivalent 130mm FOV making it perfect for head shots like those shown ... using a small, agile and brilliant lens.
Ability to set mirror delay for hand-held work, that combined with leaf shutters in all lenses, improves use of lower shutter speeds in low light.
Just sayin'
Now running for cover ...
-Marc