Swarms need that range. Without it I only see 2 fixes.

1 make them OHK fast vehicles and 3 hit kill slow ones.
2 make them sidearms with reduced skill multipliers and CPU pg usage

Without something along these lines it will take multiple dedicated av specialists to kill one vehicle. This imbalances 1 paper beats 1 rock.

I'm more concerned with swarms vs LAV's and Dropships. With the current swarm range dropships in most cases are already able to easily out run them by simply flying straight up to the flight ceiling (unless the swarmer is directly below them, then it's a toss up based on the elevation of the terrain). With the new swarm range, you will be able to avoid a swarm by simply flying a few seconds to the left.

I think as tanks now GODs on fields, give me a reason for my team to hunt them. Have a HUGE bonus in WAR point like 1000, and Additional SP for destroying a tank. SO that way there is bounty on why people should just start HUNTING for tanks. I will personally by 3 PS3 play them with both arms and feet to HUNT down tanks.

Also reduce SP and ISK earned playing those TANKS. That will balance how many TANKS there are on field.

Make AV nades that requires to approach a tank at 0 distance and takes 2 to 3 seconds to apply charge and make that thing 1 hit 1 kill on tanks. That way Tanks ALSO have to stick to squad and require TEAM WORK, not solo bad ass.