Another thing that I'm seeing are that enemies when stacked, SOME of them do not take damage. I can be standing in front of a pack (with a veil shield) of 8 in the same spot but just 1 or 2 dies, the rest aren't taking damage until an explosive sets them off. I don't know if it has to do with the collision or the death animation, but I can see they're not taking damage at all. Only way to kill a pack that is clipping one inside another is to just make them explode with a panzerfaust or another type of explosive.
This happens as soon as enemies start overlapping. All it takes is two of them. You can see it clearly right at the start, when you can kill a single enemy with just one shot to the head, but as soon as two of them get close to each other, they can easily survive even a whole magazine of headshots.
That is what I mean, single dudes aren't a problem but you can notice inmediately that shots aren't registering when they're overlapping each other, as if the damage gets nullified somehow, just a rocket blast can kill them all inmediately. It looks worse when they¡re all together on narrow halls, which should be easier to deal with, especially with the piercing rounds like the snooper rifle, but it's not the case.