It's odd that the best place to hit them is the center of the bumper because that seems like the place you'd be least likely to hit them. I assume you'd try to turn and avoid them, which would lead to you hitting with the sides of the bumper almost everytime.
Well it's part of a whole shift in the industry. While every car may not have it yet, vehicles are being designed with pedestrian safety in mind even if that means no air bags.You're unlucky to get hit by a car, but you'd be lucky to be hit by this particular Volvo vehicle because pedestrian air bags are really not common whatsoever.
Glad that the Qashqai got 5 stars though. I wouldn't completely disregard a vehicle if it didn't have a 5 star rating, but at this point it seems like you shouldn't really be putting a vehicle into production without it living up to the highest measures of safety.