Been offline for a bit, but here goes. Why wouldn't I want a full frame camera anyway? Because I don't want to go FF, I don't need to go FF, my favourite lens is not FF and I don't want to pay for FF, and for the lenses to get the full potential of the sensor. A new D810 is approximately £1k more than a potential D400 would be, and even more than a D7**** if I thought it was good enough.
While having the option to crop and still have lots of resolution is a plus with 36mp, to get the high FPS you have to go to DX mode which leads to a smaller view of the subject in the viewfinder.

No thanks.

For some, and contrary to what Nikon may think, not everyone wants, or needs, FF.
Looks like there are more Canon 7DII rumours by the day, which will may hopefully lead to a new camera which may be good enough to replace a D300S and the 7D. And you never know, give Nikon a kick up the behind.
And if I don't want to put my hand in my pocket for a D810, then I definitely don't want to dog deeper for a D4.
Contrats to anyone who can make the jump from a D300S to a D4 whilst not getting paid to do so.