A offline mode, im certain many players (including me) suffer from a low Internet connection, which can kick you out of the game since you need Internet to launch the game, and also to use any of its features, i would think adding a gun range could improve this by giving players something to do while their Internet is offline, it will help with their aim and provides them all the guns with unlimited range attachments and ammo to practice in the range with all the time the player wants to use with their free will, also adding a practice mode where you fight bots instead of actual people could also fix this issue, which would mean also removing vehicles for that mode except for tanks, and helicopters since it would be perfect for a npc to run the vehicle. This concludes my idea!