When fighting enemies, the big nameplate on top of your screen displaying enemy HP bar, name and status effects doesn’t update as dynamically as it used to. Often when fighting a big boss or elite, the nameplate will switch to some small mob that dies in one hit and then it remains on the corpse instead of switching back to boss. As a result, when fighting a boss that has adds, you don’t even see the boss’ HP unless you actively search for it with your cursor.
Similar thing happens when opening a skill tree of a certain skill. After doing so, it automatically displays the mouseover tooltip of the center node (the skill itself) and you have to move your cursor / mouse quite far away from the center to make the tooltip disappear so you can start browsing the other tooltips of individual nodes.
I would assume that for a new player these aren’t huge issues, but I am certain that these hover tooltips weren’t like this before and it feels way worse now.