I haven't used Tow mode while paying attention to ECO/MDS. You may be on to something there. I have noticed the shift points and engine braking are noticeable different in Tow mode. It's definitely more agressive. MDS doesn't bother me and I welcome the fuel savings from lower shift points when I'm not in a hurry.
Mds doesnt bother me much either. But i was exoerimenting fir a few days and figuring things out, including MDS effects of the TOW mode.
I just realized that if only 4 cylinders were running, and making the exhaust sound like its gurgling air blobs at times...then in order for me to hear my Hemi i need to turn Tow on.
Then, while it was on, the engine braking effects were clear and the gearing seemed tighter.
The Tow mode it seemed was no different than my sport mode in the Grand Cherokee. Held revs higher for better throttle response, like engine braking....and the sport mode also tuened off the jeeps ECO button, which is the MDS.
The tow mode to me is the sport mode.
So if I already have that, im seeing less of a benefit of the pulsar. If i get bigger tires, maybe I could use it.