The auto will redline under hard acceleration just as a manual will and you have S mode which increases the revs for the same given speed as in D. You can also manually hold the revs with the virtual gears provided by the 7 speed paddle shift.

You must not live somewhere like Sydney where if you don't accelerate hard sometimes you'd become a hood ornament on a truck. When you see AC in the rear vision mirror its time to move. Thats the AC in MACK.