This. I have two mouses, one is a logitech and the other is a nostromo. I cant use the m4 + 5 buttons on my logitech, and I cant switch between keybinds on the nostromo, which is a built in feature. I play on a laptop so I really cant stand using the keyboard. I've been giving feedback about this since beta and I was hoping that they would put it in before launch.