I would like to see the following platforms re-introduced with the following roles.

Enforcer: Weak tank, massive gank. Drawing inspiration from WWII Tank Destroyers the weapon platform is fast, fragile and cheap. it is intended solely as an AV platform meant to terminate enemy HAVs and Marauders, but unfortunately falls behind the Madrugar or Gunnlogi in raw defenses. As a secondary role, we draw from the ZSU mobile gun platform. Uniquely among HAVs, the Enforcers can elevate their guns to attack and kill dropships though they are highly vulnerable to retaliatory fire and infantry AV. Enforcers can mount only one point-defense turret.

Special note: Enforcers are 25% smaller than their larger brothers to give the crews a chance to escape and avoid fire intended to kill larger vehicles.

Marauders: NOTHING STOPS THE JUGGERNAUT! A mobile armored nightmare intended to give meaning to the phrase "Tank Shock" Marauders carry powerful defenses intended to allow them to wade through withering fire to destroy through sheer resilience. Marauders carry heavy defenses, but their weapon systems are usually secondary, relegating the remaining power grid and CPU to lesser quality weapons. Highly resistant to Infantry Anti-Vehicle weapons, Marauders must be properly attacked from the weak point, or else by the most persistent and murderous Gunners might be able to bring one of the beasts down.

Special note: Yes I think Marauders should be the most resilient weapon platforms in the game, period.

Logistics LAVs: The infantry saviors on the battlefield, Logistics LAVs are slower transports that repair infantry nearby as well as resupply nearby allies (slowly). Soprting higher defenses than a standard, fragile LAV, the logistics gives up speed in exchange for it's heavy nanotech repair and resupply systems, leaving little room for a power plant to engage in fast attack or escape dedicated attack.

Logistics Dropships: The saviors of the skies are difficult beasts to master, and fail utterly at matching Assault Dropships for speed or maneuverability. Maneuvering close to friendly vehicles, Logistics Dropships are the mainstay of battlefield HAV and ADS support. When two Logistics Dropships form a spider tank with another vehicle in support, the only prayer of breaking the chain is to directly attack and destroy the Ivory Angels before one can hope to destroy the actual threat.