Noticed difference as well - larger groups, more rapid spawns since last I played. Started fresh game like you to level new char and relearn everything.

Just a tip though, I can make it lot more manageable, like huge difference - by placing workbench down anywhere I am going to do a task (like mine copper, etc).

For picking up loose wood, rock, or quick 1 tin node, obviously don't do this. But any task, I setup workbench + quickie shelter bed. Takes like barely 30sec at this point.

The workbench protects from further spawns, not existing spawns, so I have to fight off the 1st or 2nd wave, then they basically stop other than random few roaming mobs from far away.

You may need to place 4 benches down, no need for cover as existent of the bench is fine for spawns, in a corner shape to make a big square of protection. I use a mod that extends my workbench by 4x so 1 bench in the center is same as 4 benches spread out to corners with default.

Anyway, it's made scavenging in black forest ton easier.