Ford would be silly to waste money developing a V8 Raptor just to appease the old dogs who refuse to drive a V6TT. Truck has great power, great MPG, and is in such demand that many buyers are willing to pay absurd ADMs just for the right of owning one.
It would be a huge waste of R&D money just to keep a handful of traditionalists from defecting to Ram or Chevy. It might have happened if the G2 landed with a thud, but that definitely hasn't be the case and the Raptor is one of the only trucks currently being sold that doesn't require huge incentives to get them off dealer's lots.
I agree with everything you said other than people willing to pay for them. my dealer here in Cali where everyone has money to burn and they have 6 Raptors on the lot right now. it is a small dealership satellite station at that.
the 6.2 was no where to be found anywhere in 2013-2014 I didn't look hard in 2012 so can't say. I know I went to Boise to get mine and it was a trade in I caught at. chevy dealer. when I got there it had 700 miles and I paid MSRP it was limited edition and the sales person had a list of people waiting if I didn't show up. I have yet to see anything even close to that with the new one. I even seen one 400$ under MSRP on Ebay
sorry for the rambling