Summoning vehicles allowed them to scale up to the rest of the player's gear and come in many more variants, shame. I'll miss the giant 4 player mech that can hose down a whole army with homing missiles and pump any large target full of massive cannon shells (but required killing a ton of enemies before it can even be summoned once).
Looks like some of the strikes became cooldown based instead of point based to make up for that, some of those cannons are really spammable (autocannon reloads in 5 secs, keeps shooting for about 5 secs, 150mm cannon reloads in 3.5 secs for extremely powerful sniper action).
Also looks like the Raider gets a buff for vehicles? The machineguns on the speeder and heli rip through insects in no time and of course the improved vehicle physics help a lot with making the tank not suck. I could swear those MGs were worthless in the original EDF 2.
Hm, I should try the Soldier again though, the lack of grenade throw charging should make Firecrackers awesome again.
EDIT: Maaaaan, the Air Raider is OP with his ability to handle all situations with one loadout. Limpet, Autocannon, 150mm Cannon lets you mow down ANYTHING. Precise at any range, extremely powerful single target attacks AND area attacks that even hit air units extremely well. Or swap the Autocannon for a Strafing Run for more devastation against swarms (but needs to hit a few things to reload). Yes, doesn't work underground but Limpet Splendors are probably the best weapon for tight tunnels. Hits a bunch of targets, little risk of self-damage.