All the publicity the G2 got in the automotive world brought a spotlight back to the entire Raptor line. That boosted interest in all Raptors. Add in the hefty price jump and ridiculous ADMS, and all of a sudden a $50k G1 trucks seems attractive. But as G2 availability improves and used prices fall, so will the Gen1s. As much as the G1 guys love their V8s, most buyers will prefer the improved features and younger age of the G2.
People who didn't know what a Raptor was by 2014, still don't. They don't pay attention to the "spotlight" of the automotive world and it's just a F150 with some big tires to them.
I really think both trucks stand on their own way more than you think. Lets go back a few years and compare some other high end Ford specialty vehicles shall we?
A 2003 Cobra had a MSRP of approx $34K. One with 20K miles in great excellent condition books at over $23K now. $11K depreciation. It still commands 70% of it's original MSRP. Very impressive for a 14 year old car.
The "next Cobra" was the 2007 GT500. MSRP was approx $41K. One with 20K miles in excellent condition books at almost $29K now. $12K depreciation. It is also worth 70% of it's original MSRP, again very impressive. Compare both to any Vette from the same years...
So the older 2003 chassis with less power still is worth the "same" as the newer 2007 chassis which is safer, has more power, better handling, better brakes, etc. It even has the Shelby name attached (literally), yet comparing new vs used values- it still has no additional value compared to the 2003. The GT500 is also not saddled with a horrible sounding engine either- both have blown V8s.
You guys can mock all you want- but remember that hearing is one of your five senses. Smell and taste don't count when it comes to vehicles- so you are taking away 33% of the "experience" of driving a Raptor when you take away the nice V8 melody and replace it with V6 *blat*. Ford knows this- that's why they tried to fake it with the stereo system.