Make mob gravestones have a different visual cue depending on whether you have already interacted with it or not.

Current problem: You either loot all mobs fully which is tedious and annoying when they drop tras****ems you don't want, or you try to selectively loot only the fresh graves for the items you desire, but that's very hard when you've killed a bunch of enemies and the gravestones stack up.

A different visual indicator (e.g. different tone of yellow, maybe more dull) would solve this problem.