For me, the underhood paint thing doesn't bother me at all, being that most every other mfr does the exact same thing legitimizes it as an industry-wide consensus of this being a sound cost saving strategy. Genesis has to find ways to control cost in less significant ways, in order to spend in on things that do make a more significant impact.
Take the hood, for example... G70's is made of aluminum (trying putting a magnet on it), whereas the hood on the Stinger is steel. Realistically, they could've given the G70 a steel hood and most owners probably would not have noticed the extra weight, but... Genesis did their calculus and was convinced the extra cost is worth the weight saving up front, perhaps for a better F-R weight distribution for better chassis balance. To me, that is a quantifiable improvement that can result in a measurable performance gain. Given a choice, I'd take the lightweight aluminum hood over fancy underhood paint any day of the week... especially AutoX Sunday.
But that's just me. Not to say I don't have my pet peeves with Genesis cost cutting on the G70. I'm forever miffed about them ditching the double wishbone front suspension, when they modified the G80 chassis into the G70/Stinger. At the end of the day, I'm still glad they did what they had to and were able to offer the G70 at this price point. Had they splurged on every facet of the car, in order to please everybody, I doubt the G70 would have happened at all. Or at least not at the price point we are interested when we bought ours.