The APC would be and fun addition to the title as it could be a more quick and flexible vehicle than the tank, its also one of the vehicles we haven't seen in any of the updates, the APC would also be great for your organizations as it would be able to safely move you and your associates from one spot to the next while also being able to defend yourself.

Also the insurgent doesn't exactly count,since this type of vehicle is very different, it could have 4 to 8 wheels, players cannot be shot out with bullets also the insurgent doesn't have a high caliber gun (something like the passenger seat gun on the Valkyrie, or a 90mm gun).

best of all is if the vehicle is added to the game it wouldn't be in the slightest over powered because the tank already exists and everyone pretty much carries around an rpg so it would just be a great vehicle for transporting players or taking out NPCs.