I was thinking a bit more about aerodynamics, and I think overall it is a minor concern, at least for cars typically driven under 80 mph. Above that down force is a concern.
Below that, interior room is a concern. Americans appear to like SUVs and CUVs, I can understand the attraction (now that I own one). The raised height vs a sedan is perhaps the biggest ero negative, air under a vehicle is bad in all sorts of ways. This Blazer has a Cd of maybe 0.35, it wouldn't really help much if it was 0.30. All these boxy SUVs trade off lowering Cd against interior volume and ride height.
Anyway, I'm fine with the look of the vehicle, I'm not interested in buying one.
Somewhat related, I've found our Tuscon is very speed dependent on mpgs, in part because it's heavy and in part because of its high Cd (probably about 037). It's EPA rated at 37 mpg highway, but that has to be at 55 or 60 mpg with some periods of slowing down, akin to the EPA highway cycle. Around 80 mph, it gets about 28 mpg leading to a lot of compaints on line.
If you want low Cd vehicle, look for sedans or sports cars, not SUVs.