These multiple failures were due to the shop only fixing a symptom of a bigger problem. It's no different than putting lotion on a rash and not addressing how you got the rash. I am lucky to have two dealerships that are high volume commercial in my area, so they have better qualified techs. This kept my 6.0 running well and keeps me shaking my head at some of the problems others are having.
Although I feel that there are flaws in the 6.0, I also feel that that a properly maintained and repaired (if there is a failure) is not the bane of anyone's tow vehicle woes.