In regards to looting bodies for ammo, I have found that often times the game performs dead-body removal before I have a chance to find or retrieve ammo. I really hate how this aspect is designed, I can somewhat forgive them for the small amount of entities in the game (80) but the quick removal of bodies just ruins the immersion in a sense by sterilizing the battlefield. I for one like to see my handy work

If the above is EGO core design then the only hope is a patch, but if it's in regard to HAVOC then body removal should be moddable. I remember BIA having the same issue until one modifies the HAVOC config.