Me against all those Russians... so scary!
$3000 it's insane, and Pentax is better off without such "customers" - ready to bash Pentax for daring to make a product outside their price range.
It's easy to understand where they aim with this product if you can look further than
your wallet. There are people who buys long, expensive Canikonigmony (Canon/Nikon/Sigma/Sony) lenses; why not for Pentax, too? There were people who bought the FA 600mm f/4, there are people who would grab one if they see it on e-bay. FFS, there are long lens owners on this very forum; and we have 9 reviews for the FA 600mm f/4.
If you don't have anything to offer to them, maybe not in the ideal shape and price from the beginning, you'll simply lose them. Or you could scare away other potential $$$-spending customers.
The trick, however, is that Pentax is a company and every company should strive to make a profit. Understand this, understand how much harder is for Pentax to do it with such low volumes, and you won't be disappointed when they will "fail" again to launch a lens for half of what a 3rd-party would ask.
But, you know what they say (the Vorlons, I mean) - understanding is a three edged sword: your side, their side and the truth.
And I'll ask again: who said it isn't FF-compatible?