The mission messages (and others) that pop-up can be fairly detrimental. They'll pop into the middle of my screen, and I can't seem to permanently move that UI window.
I wouldn't mind so much, but they come up at some very inopportune times. Frequently, I have to choose between reading what I'm supposed to be doing, or defending myself from the enemies attacking me as I zone into a new area. I'd really rather my bridge officer didn't stand in my view to tell that I can beam down as a Klingon ship is busy firing at me.
Additionally, the pop-up will interfere as I'm trying to grab one of the few drops I get, sometimes causing me to accept leaving the area by mistake.
I like how there is the small UI button that can be expanded into the notification windows. That would be great to be able to set as default. Better yet, it should automatically be set as default if you're currently in combat.
Alternately, we should be able to move the default position of that UI window.