RPG/Lock-on/Heli balance patch

Nerf the rpg ammo surplus (gives assault more purpose to keep their team supplied).
Nerf lock-on range, buff rpg speed. (Encourage faster strafe runs).
And buff the acceleration rate of the heli when it's falling. Irl, the rotors have a significant amount of drag. (It feels like I'm on a huge bungee cord when I'm recovering from a dive)