In the FA Forever lobby I have 'notifications' enabled. In the 'Notification Settings' I have only one option to choose the popup position; bottom right. Just having one option there isn't so much a problem for me, but it choosing the primary screen by default is a problem though.
I have the luxury of multiple screens and to maximize primary working area I have my taskbar on another screen. I would like it a lot if the FA popups would use the that same screen. Pretty much the same location where the usual 'balloons' appear; at their corresponding icon at the end of the taskbar (in my case; top right of left screen).