Should have been? Nah, thats like saying the Boss 302 should have been the base GT in 2012 and 2013.
In a perfect world we could go to a 3D printer and print any car with features that we want. In the real world, exclusivity and the ability to pay for performance rules the day.
Special edition Mustang, Voodoo engine, world class suspension, limited production, balls out performance on a road course all wrapped in a factory warranted package? Yes thats going to cost some dough.
Invoice alone will be more than a 401A GT retail. Would be nice if it were the base GT, but realistically thats a MASSIVE bang for GT bucks.