I'm not an engine designer, are you? Have you read your operator's manual? And... apples and oranges, I'm afraid. I understand peak power curves, but my comment had to do with compression braking.
Ice, and downhills with ice plain scare me in an auto. I want the instant application of power when I need it, and the instant ability to remove all power if it needs it. Add off road issues, and we’ll be buying 13 speeds for a long time.
In another couple of years you find any manuals in company fleets, simply in a fleet situation across the spectrum of drivers the auto's now have proven there more dependable and more economic for the fleets. Personally I don't care I'm a driver I can drive what ever they purchase. If I'm buying then I have a say, If the company is buying it, drive. If your stupid enough to claim your going to quit, your lieing to yourself, your not going to do anything but cry like a baby, shut up and drive what they buy, or go buy your own.
I have a 18 speed Eaton Ultrashift for almost four years now. Generally I like it. But it does some stupid stuff occasionally. There's enough frustration that I'll go back to a manual next time. Better control in farm yards when the lack of traction is an issue.
I don't find any control issue with the auto, except if I need to rock it out of slimey stuff, mud snow sand.