Didn't see anyone else mention this but before 18.0 usually things would go like this.
-Kill mob.
-Pause.
-You gained XP and have loot rights message.
-Longer pause.
-You can loot the corpse.
Now it's more like.
-Kill mob.
-No pause at all.
-You gained XP and have loot rights message.
-Short pause.
-You can loot the corpse.
Only down side is after you kill or even loot it and the corpse disapears you can still tab the dead mob for a while. They are still shown in the PF map during that time as well. In LE missions I could be down the hall and in one or more rooms away with the thing still shown on the PF map till I was too far to see mobs in that room anymore. Then when I did do that at times if I came back the dead mob would still show up on the PF map and may even be shown standing there when I went over. This was just client side, the server considered it dead, so while I could select it I would not be able to attack it.
Aside from that little client side glitch this change is quite nice and I had at times thought of suggesting something like that be done.