I went from an '06 to a '14. I had a lot of upgrades on my '06 just like you. That truck ran great and during my ownership of it, it had very few problems. Well, I bought into the hype of all the modern electronics, amenities and comfort of the new trucks. Don't get me wrong, some are nice, but others have been nothing but problematic.
Someone mentioned above about def not being problematic. That's complete garbage. I've gone thru two def injectors, one pump and some sensor. My def tested good every time so that was not the problem. It was all covered under warranty, but the truck still has to get to the dealer somehow/sometime and they aren't open on weekends so that costs time and missing work. Also, I don't know what kind of mileage your '06 get's, but mine was 18-21 on the highway, depending on the weather conditions. My '14 is right around 16 on its best day in perfect conditions. My radio has gone out twice, a couple other sensors replaced and the cat replaced.
My recommendation to you would be to wait and see if they do eliminate the def system and work out a few more bugs. If I could go back to the day I got rid of my perfectly good '06 and bought this '14 I'd slap myself across the face.