I just can't imagine somebody placing that much importance on a DCT in a car as unique and appealing as the Gen V. I can see having preferences, absolutely, and if somebody couldn't physically operate a manual they would be delighted to just have a automatic as an option, but I can't see them having lost many sales because of it, and not sure the Viper's future would be any rosier in 2015 if they miraculously came up with one.
Most of my friends are high performance driving track rats, and while a number of us own 3 or more track cars, we don't seem to care about DCT's at all. The tech guru among us had to have the GTR for all it's tech goodness including DCT, and soon after said how his sports cars with manuals felt like dinasaurs in comparison. He just bought a new Stingray with manual that he also plans to track, and is already talking about maybe selling the GT-R. I guess a DCT does not make the car for him either anymore.
Here's a review of the new Z28 with dinasaur stick being compared to your DCT P-Turbo and GT-R Track Edition, and the reviewer's comments about the manual. It's going to be a very long, long time before the manual becomes extinct among the over-whelming majority of hard-core enthusiasts that buy cars like the Viper me thinks. Still, I hope they incorporate a DCT and other changes to appeal to those with other interests, but I'm not pinning my hopes for the future of the car to them.
http://www.motortrend.com/roadtests...8_porsche_911_turbo_s_nissan_gt_r_comparison/