Concrete filled barricades cannot be vaulted. To me it felt like it should be possible but no big deal.
On the map Crossing at the crossing of lines D-E 5-6 there is an invisible wall that feels very misplaced.
Spawning in the middle of mortar fire.
On Hideout at checkpoint G there is a house with a very small balcony that offers a lookout over the checkpoint but cannot be accessed, and looks to me non-intentional. (there are multiple house that have this)
As car driver you are unable to look all the way back, which would be very handy when driving in reverse.
That's all I had now.