I have already described DE despawning in odd way.. some collisions even stayed but view LODS - gone...
https://feedback.bistudio.com/T184286 has a custom policy but maybe handy for the team

GroupEvents should be effectively cleaned up at once.. also we do not really know when for the CE it is considered as non-active so the pool has a free slot

UMP should go to T2/3 police
AKS SKS should go T2 military
Press vest T2 military
Blaze should be way less on cherno ang go to T2 hunting

Is this on experimental...?

rendering settings in general

I generally agree. Right now you can use addon prefixing to do that, but this would change every intcance of an object and not create a new variant. This solution is also data-heavy because it requires you to re-upload all vanilla textures again for the folder you are overriding...