From what I saw, the damage numbers are now behind the monsters instead of "in front of". The bigger the monster is, the harder it is to see the numbers. The damage numbers still show up, but are hidden because of the size of the monster. That's also true for some other forms of test, like the name of players hidden by some objects, monsters or other players. This was probably to fix an issue where in some landscapes, when you entered a cave, you could see if an orange name was there while loading. I hope they fix the damage numbers to show up in front of the monster you're attacking so you can more easily see the damage you do.