The new transmissions are awesome compared to what our cars came with. Adjusting the shift points in the modern transmissions can literally gain tenths in the quarter with just a little time tweaking some settings. I love the 4-Speed in my Mustang but the modern auto trans has alot of pluses.
I use SCT Pro-Racer Package on my truck with the 4R100 and it is insane the amount of control you have from a laptop. It just takes a bit of time to learn the software and just what you can do. Once you get it dialed in it is easy to swap profiles for DD Duty, 1/4 Mile, or Twisties.