A request of mine would be to have an option for brightness in-game. Right now a lot of outdoor areas are a bit blown out. Just having some optional settings for brightness and contrast would be neat.
A request for later updates, would be to add night missions again, preferably also ones specified on stealth and sniper combat. You have an amazing function in the game where you can shoot through walls with certain caliber weapons. I would love to have a mission where you can spot enemies, line up, and shoot them through the wall.
This could be done in such a way that earlier maps now have a night model, like in the first game, but then maybe just a local play mission where you focus on sniper gameplay, a more cinematic experience. I understand this might not work as well for COOP multiplayer, but having the option would be nice.