I'll tell you the two things that I am unimpressed with on my 2011 limited.
1) it's under powered. This truck could use more power.
2) the brakes, you have to engage them a considerable amount to start to slow. I just had it in to the dealer today, they said it was completely normal.
1) more power would translate into "At the sacrifice of gas mileage"...personally I like the balance of slightly underpowered and great gas mileage. If I need power, I use 4th gear (No OD) when towing.
2) I agree, the brakes do have more travel to the floor than other vehicles I've owned.