This is MY OPINION of how tanks should be re-worked in the next more vehicle based battlefield game.
TANKS:
Tanks should be feared. They shouldn't be a minor problem that can be fixed with an rpg-7v2.
TANK GUNS:
Here we go. The main gun on a tank should be able to be changed out for a few different variants. For instance, for the M1A2 Abrams should have 2 guns to choose from. The 105mm rifled gun should have lower shell velocity and damage, but better accuracy and a higher Rate of Fire. Or you could choose the 120mm smoothbore, which would have higher shell velocity and higher damage, but lesser accuracy and a slower rate of fire.
TANK GUN AMMO:
In battlefield 4, AP ammo has the highest blast radius of all the ammo. Are. You. F*cking. Kidding. Me. Standard AP (which nearly no-one uses anymore) munitions in modern days are a solid hunk of metal. They have no explosive power. At all. Dice, If you want to add different Ammo types, add these:
HESH: Explodes on the outside of the vehicle, sending a superheated shock wave through the armor, melting and fragmenting the inside armor, usually injuring or killing the crew
HEAT: Creates a jet of air that literally pushes the armor apart, making a hole in the tank and sending fragments of superheated metal through the tank.
APFSDS: Uses a sabot to propel a depleted uranium-core dart much faster than a full shell. Known for going through tanks, shattering explosively in the tank, and causing birth defects and cancer.
There you go, REAL munitions for a tank.
TANK ARMOR: Modern day tanks have very advanced armor. A puny RPG-7V2 would not hurt a modern MBT unless it hit in the rear, near the engine. Also, even shells dont always get through the armor. It would be amazing if they added a feature where the game actually calculated whether of not the shell would penetrate. If you angle tanks, it will be a bouncefest of shells. With this feature, you actually have to aim.