you should add thermal sights that only work on night maps or through smoke
you should also add a campain with secrets
Game will turn into fights through smoke as it will be very OP. Everyone will be forced to play that way, because players with thermal + smoke will have huge advantage.
Also night maps in SW are not so dark to require NV. Make them darker just to play with NV is also so-so idea.
"campain with secrets"?