Except that it does. When you mix talking and fighting - in the past it'd just focus away once you hit enter or exit the chat, now it sticks and you can never tell when the focus is on or not and more often than before your movements are instead typed into the chat window.
If you can't tell whether your focus is in the environment or the chat window, you have other things to work on.
Also, it's blocking about 20% of the screen and really gets in the way.
Try 5% at most.