Maybe its just me, but it feels like lootable corpses disappear way to fast. As a solo quester, I often find that when taking on a bigger group of enemies, the first enemies I kill will start to disappear before I'm done killing the rest, meaning I need to stop in the middle of a sometimes intense fight to loot corpses before I lose out on them, especially if its part of a quest item or I need to get someones head or something like that.