I'm not convinced by this refresh - the original design was arguably so coherent and successful that these changes are superfluous to me. The original CX-7 look was striking, bu at the same time it was quite restrained.
Don't you think this is a common thing these days: badly updated designs that were still fresh at the time? The most obvious example is Nissan Murano, but don't forget about 350Z/370Z and others. It seems designers have run out of ideas, or it's more and more difficult to make something fresh when the old model is far from looking outdated.
As to the diesel power in the CX-7, I'm a bit disappointed with performance figures, but the economy will be a real bonus. I know something about performance, but also about economy of petrol CX-7, because my father drives one...