Drastic changes to an existing platform or a course-change to an utterly new platform can be 'bet the company' moves in terms of R&D resources and market acceptance. There is more to get / go wrong than there is to get right -- be it for Hassy, Phase or anyone else.
As much as a X folks want massive 'tipping point' positive changes (as much as they'd be nice in any system) , there are many, many more who will not among pro users, rental shops, retailers. The first two will be "Economy sucks, jobs are harder to get, thinner $$ -- I can't play beta tester to the tune of $30K to get maybe, maybe marginally better pics. I know what I like to use and what performs for me (H or Phase), just make it better".
The latter are "I can 'sell' an H5D or Phase DF2 to my pro base easily as I can point to what it improves upon w/ a proven record -- some utterly new Ubercam w/101 unknowns is tougher."
Also - the more drastically you change your core platform, the more you risk polarizing acceptance -- and that opens some of your installed base to consider moving to the competition. Much better to say "...this is your H4D in black & SS, modest improvements across the board -- low risk".
Also when was that last time any camera maker -- 35mm or MF made ANY huge drastic sea-change?
The 35mm kids increase MP count and improve ISO performance. They tweak their AF systems from good, to "Why in the $%^ did they %^& with it !?" levels then back to good again. That's about it. No 35mm version of True Focus. No dual-shutter systems, no > 35mm sensors (huge installed lens base), no onboard RF control or triggering of units from a lighting partner (or even their own bloody speedlights). They tweak the basics, market it up the ying-yang and sell them hand over fist.
Yes, the high-end 35mm bodies like the 800e pose risks to MF land, but bear in the mind that the closer MF manufacturer's make their units look and feel like a larger high-end DSLR, the MORE they will be compared against same - and the more they'll need to (and maybe be unable to) justify the $$$ difference.
Anyway, just $0.05 from someone from the 35mm side of the fence who (despite the drawbacks of MF) lusts after things like TF, sync at 1600, > 35mm sensors with fat pixels and sensors you can clean w/o playing "Operation" every time.