The Game is great, Here are some improvements, or for a Hardcore game mode or something. Thanks for making a fun action packed game.

Allow players to switch teams to friends teams. Maybe ability to vote players of squads to make room for friends. (Might be necessary)

For Infantry
-3-5 Rounds Downs enemies. (so 1 bursts of fire) It takes to many rounds to kill enemies. If there isn't body armor.

-1 Headshot downs enemies for all weapons. If there are helmets it can stop handgun rounds.
-Make blast radius of Rpg's kill infantry. Its too weak.
-Make another red dot sight with Circle and dot or a larger red dot for close combat.
-Add M203 Grenade launchers.
-Magazine drop free on Ar pattern rifles.
-Add smoke grenades.
-get rid of Cooldown for loading RPGs. If anything make user have to pull charging handle to re-arm or to slow down reloading.
-Squad Leader Radios to talk to other Squad leaders

For Tanks
-Coaxial 7.62x51 Machinegun for tank driver/gunner.
-Make enter/exit vehicles a different button. People accidently press thumbstick.

Vehicles
-Make some vehicles more bullet resistant.
-Make .50 cal Machineguns 1 shot kills.
-Add MK19 automatic grenade launchers on some Vehicles.

For Lefthanded/Wrong handed players
-Move Pistol to Left Hip
-Move Mags to Right side of vest.
-Switch Jump button to left hand.