Rocks are not a big issue in Europe and I imagine the sloped front windows
will get much less bug splats than upright ones - I've just switched from a fairly upright windshield car to a more normally sloped one and the reduction in bug splats is wonderful.
The handles on the back are a standard European fitment for manually manoeuvring a trailer - nowadays many folks use powered movers to do that, but tradition persists. Bear in mind that all European trailers have mechanical brakes
with a handbrake and a jockey wheel under the jack, so manual manoeuvring of the trailer on its own is a normal thing.
What's surprising is that they haven't fitted any matching handles to the front as those are a standard European fitment too.