from the specs.. if they are all true, it just seems like Canon is trying to push out an entry level full frame camera, but at the same time fear that this 6D will kill off sales for Mark III... so they made the difference so significant by taking away some goodness that will make 6D perfect from the price point to features ratio.
but i believe if 6D is priced decently, there will be market demand for it, thus lots more full frame shooters out there.. i just hope this move doesn't diminish the "wow" factor of full frame cameras..