I have submitted this bug with the in game menu as well as submitted a ticket as I know others have too. This is completely and still unanswered since beta 1, maybe earlier not sure as I wasn't apart of the alpha testing.

Borderless window is not the answer I'm looking for, the drop in frame rate and horrible screen tearing is completely unacceptable! In the words of Fry, fix it, fix it, fix it!