I know the redesigned the car for 2015 to improve on the IIHS small overlap crash tests. My son has a 2015 Prius v. So the front was redesigned for more than just aerodynamics. I showed the 2016 to answer your question better.
Here is a quote about the improvement from IHS The Toyota Prius v, which also earns TOP SAFETY PICK+, saw even greater improvement. The midsize car had been one of the worst performers ever in the small overlap test. In 2012, the structure collapsed, and the dummy's head hit the instrument panel and ended up between the side curtain airbag and the door. Measures from the dummy showed left hip and lower leg injuries were very likely. After the structure was improved and the side curtain airbag was lengthened, the 2015 Prius v performed well all-around, with low levels of intrusion, good restraint performance and low injury measures. From 71 vehicles earn 2015 honors from IIHS
