I personally would be highly interested in a 1/2 ton diesel. But it doesn't have to be a horsepower war like the big 1-tons. Rather, let it be a MPG war.
My chevy 5.3 half ton does whatever I need it to. But the 16-17MPG sucks.
When they have the ability to make the big diesels push over 700HP and gobs of torque, why not scale that down a bit to a more modest 350HP or so, smaller displacement, and GREAT MPG. If they can make 700HP diesels in 1-tons push 22 MPG or better, there is no reason at all why a smaller displacement less powerful diesel shouldnt be able to do north of 30mpg, and still tow/haul better that the smaller V8 gassers in a half-ton with close to double the mileage.
And considering it will be a smaller engine, it shouldn't cost 6k more. rather something like 3-4k more and I think they would be able to sell like wildfire just from an economy standpoint. To me, a $35,000 diesel 1/2 ton that gets 30+ MPG would be a better buy than say a $32,000 gasser that gets under 20