Don't get me wrong, if I were in the market today, a turbo diesel will be a big plus (and we will see more diesels as the new MPG requirements go in place.
However, when I bought my GC in '12 there was no diesel available. Further when I buy a new car that I like it tends to be kept for decades (why I have a lifetime warrenty) and the V6 has proven to be fine for pulling the TM. The only downside was that after 20k miles the OEM tires began felling a touch squirrely in the rain so I replaced with Michelins.
BTW the mix may change dramatically in the next decade as
new CAFE requirements take effect.