More or less time in high gear by changing 1-2 shift point still isn't going to change (hardly) rpm through the traps though it will affect ET.

Weight/aero vs horsepower. It's going to trap similarly no matter what. (mph and rpm).

Unless you're talking about holding out on the 1-2 shift until it noses over or runs into valvetrain instability but I don't think that's going to help anything.