I agree it's not an exciting look. But let's remember that first and foremost it's a LUXURY car, not an off-road SUV. They may refer to it as an SUV for marketing purposes because SUVs are the most desirable class in the US, but it's a long way from being a true SUV (like an Escalade or Expedition). It's really a wagon in my book, if I had to pick one category to describe it. It's not tall enough to be a true SUV.
Given that it's really a wagon design, and it's a luxury car, I think the styling fits. I wouldn't try to make it sporty looking. It's already trying to be so many different things (SUV... wagon... minivan...) that trying to add sporty to the list would just confuse it more. The "sporty" comes in the most practical part: the rocket ship power.
As much as I would like more SUV-like height and better (way better) visibility out the back, I know that would seriously reduce the range. The super range is one of the biggest selling points, and the #1 reason I chose it. Without that I'd have picked something that's a real SUV.