adv explosive mg + adv bio mg will be fun XD on heavy hehehe... Even apc at this combination can rape any tank. But i really like it that idea of "adv mg" weapons like bio/explosive mg. Even Light Tank or just AFV can use that mg. And i agreed decrease speed of heavy tanks and artillery tanks.
not much more easly will be implement to possibles of shotting down rockets? Like in most of FPS games? like unreal tournament, C&C renegade, if i good remmeber even on battlefield that was possible, to shot down incoming rocket. That will be improve value of "chain gun" really fast fire rate, suck at longer range vr infantry, but will be good to shot down of missiles (but at this rate... missiles dmg from vechicles/ML's should be little increase)