Low end torque and altitude performance aren't diesel attributes- they're turbo attributes. A well executed gasoline DI turbo engine closes the gap on performance, without the fuel issues, more expensive after treatment, etc. Part of the challenge with diesels is that they are limited to about 4000rpm, which limits horsepower. HP is a function of speed and torque, so to compensate, a diesel need to make much more torque for the same acceleration performance. Problem with that is the transmission now needs to be bigger in many cases. That adds weight and cost.
From what we've heard so far is that the new 2.0T that just launched in the Lexus NX will be used in RWD cars and trucks. I wouldn't be surprised if it technically becomes the a TR-FTE instead.