If your in fullscreen n u don't crash alt tabbing, your using a 3rd party app or script..lol..
More to the point, your not really in fullscreen, your in a borderless windowed mode, which still gives u the performance hit.
Yes, please, they neeed to fix this.. Playing in windowed gives me a nasty performance hit.

Besides this is freakin 2011 here people.. come the heck on..
People been doing this for well over 20 years now and you guys can't manage to program alt tab in fullscreen?
That's like saying your game will support the keyboard but not the mouse....
Who does that?