Clan hideouts that can be built from the bottom up with themes, locations, vendors, cycle quests. Allow people to sell their unused weapons and mods in shop for others to buy and don't make it cheap to build. Plus have hideout rankings that levels up by members contributing to a score pool releasing better vendor items and base appearance.
Better sniper rifles would be the next best thing because lets face it the current ones are abysmal and enemies just charge you rendering them next to useless anyway. There needs to be a certain level of covert when using snipers effectively and enemies will always know where you are and rarely miss shots which just doesn't happen in reality it is silly. Plus head shots need a critical multiplier boost if a grunt can take 2 head shots then something is seriously wrong. Raise the reload speed of sawn off shotguns or increase damage you are only adding 2 bullets for crying out loud.
Customizable vehicles with colors, tires, armor, images and i wider range of vehicle choices to buy. (hell tractors, buses etc) Buying good tires effects speed and armor slows the car and makes less maneuverable but grants greater health and damage.

