Ford corporate has responded to reason and rational arguments and agreed to tear down my whining '12 MT82 for diagnosis and repair.
The story is long and there were many places where the other parties involved attempted to convince me this was normal, that I would be on the hook for the repair and diagnosis, etc. I remained reasonable and persistent and now they're going to open this thing and find what they find and fix it. The final convincer for the dealer was another 5.0 came in for service and they tested it out and found it was quiet and mine isn't at all. You can hear my whine from my car coming a block away.
Advice to others: Don't get angry, don't get irrational, just speak up and keep speaking up for what you know is right.
I'll update the trials and tribulations bound to ensue when they get into this thing here.
Best of luck. I just don't understand the "that is normal." mantra.