Well suppose those specs are true. It seems to me that you get most of a 1Dx for half the price. 61 pt AF, a few more megapixels, dual card slots. Sounds like a true pro camera to me, not just prosumer. IMO $3500 is not a bad price at all to start with.
Seems to me that, unless you need high fps or the extra build quality, there's really no need for the 1Dx.
If I were Canon I'd put in 19 point AF to distinguish the product lines more. But I'm not Canon.