I don't think we can say that it WILL be worth more than a V6. If major issues develop with it they could be worth less since people won't want the trouble.
I have driven several eco-boosts and I am not as impressed as you. I also will not own another current ford after my experience with the one I traded in for the Colorado. I also question some of their engineering but won't go there.
I do disagree with your comments about getting up the mountain. I HAVE towed a 4500# travel trailer (aka 8'x11' parachute) up and over 11,315 ft. I also had a load in the truck and was near GVWR. There was a 9(?) mile long 6% grade on that trip. I was passing all of the heavy trucks and topped the hill at 60 mph. That was faster than the 55mph I started at the bottom with due to the curve coming in and traffic. Boost pressure seemed to run the same at altitude as it is here @700' ASL. I was watching it on the trip to see if it changed at altitude and how much. I was also watching barometric pressure to calculate my altitude. For being near the rated limits of the truck, I was pleased. Could the eco-boost do the same? Probably, or better but I don't know where the heck I would park it and like I said, I'm done with fords. If ford puts the 3.5 eco-boost in the upcoming ranger, GM better step up their game. I highly doubt that we will see it there though.
I also disagree that any half ton with a V8 will outdo it. I have pulled the same trailer with my dad's older 5.3L extended cab, short box 1500. The 2.8L tows that trailer much more comfortably than the V8 and at altitude I would have been in the slow lane with his truck. The 4.8L in a crew cab will not likely tow as well as the diesel twin. Look at the power and torque curve on it compared to that older 5.3L and it is the loser for towing. That 1500 crew cab weighs more than my Colorado crew as well. Now, will the 6.2L outdo the 2.8L... It better! It has over twice the displacement and will rev twice as high. Just like the 3.5L EB you won't find anyone putting that engine in a midsize with a factory warranty anytime soon though
I know that the 2.8L in your Liberty shares the same heritage of this engine but there are significant differences and having driven my MIL's liberty when she had it I can confidently say that they behave quite differently. This makes sense too as almost everything on it has been changed in some way compared to the engine in your Liberty. Even the block itself has some considerable changes. The head has been redesigned, different fuel system, different turbo, completely different control module and programming, different EGR system, different oil pump and drive layout, and very different emissions systems.
I am in complete agreement with you that justifying the diesel by hoping to save money is wishful thinking and foolishness. Doing so in the other direction if gassers were at a premium is also ill advised. None of us know what will happen with diesel and gasoline prices in the future.
I agree that people tend to overlook the extra financing charges if they borrow more for the more expensive truck. Insurance usually costs more on a more expensive vehicle. They also tend to overlook the cost of DEF, fuel filters, etc. Also, no one seems to consider that today's dollars will be worth less 5 years down the road than tomorrow's dollars.
As for trim packages, for me the only additional cost was the diesel itself, as everything else that you are forced to take with it I would have wanted anyway with the exception of leather interior. I would have had to take the leather though to get the safety features I wanted. I paid the extra because I had a use for the engine. I do admit though that it is fun to watch people's eyes bug out when you tell them that you get over 30 mpg with it though and then show them the DIC when they don't believe you.
I think that people that pull the 'as expensive as a full size' card underestimate the desire to NOT have a full size truck. I would have gladly paid the same amount for my Colorado as a 1500 with the same capabilities and features. Heck, I would have paid a bit of a premium. The reason why is that a full size has a lot of negatives for me due to its size. I am not the only one that this is true for. I didn't get 'less truck' for the price in my opinion because to me the 1500 would be less truck as it wouldn't meet my needs as well.
To me, the value of a vehicle isn't what some book says it is. It is what kind of value it can bring to you, the buyer and user. Sometimes that value is as a tool, sometimes emotional, sometimes both. Unfortunately we have to pick from what is available to us and in our price range. If my dad wanted to buy a Colorado, I would tell him to get the V6. He rarely tows more than a utility trailer.