I use T/H mode when towing and in heavy traffic because the vehicle decelerates the second I let off the gas due to the torque converter being locked, which makes it easier to slow down without having to hit the brakes.
My F-150 has the ability to select 1-3, but 4-6 can't be manually selected (model year 2011 and newer remedy that.) So, T/H mode is a usable alternative.