Honestly, I wish they would come out with 1st person mode. Grand Theft Auto was always about 3rd person, Why not give the option like Fallout did? Or MW2? Where a simple press of the botton switched what mode you were in? If 1st person mode would have been put into the game, I'd say the following:
1. Red Dot Sights, Acogs, Long range scopes for all weapons but handguns and Grenade launchers
2. Laser Sights for all weapons.
3. Adjustable stocks/foldable stocks. Turn an AK into short distance weapon without a stock, increase the recoil.
4. Noob tubes? Lol.
5. Bipods. For snipers, LMG's, AR's. Better accuracy.
6. AKIMBO!!!! This one made me mad when the game came out. Why can't we carry around akimbo silenced handguns? Or Uzi's?
3 would be harder to do but the others should be added in game. Noobtubes are meh... Because of the Grenade launcher and RPG why add it? Just because. Make it expensive. Gives us another chance against tank griefers.