Vehicles aren't just collections of polygons, they have curves and shape and look like someone designed them who was going to use them for their purpose. The helicopters look especially good and detailed. Battlefields aren't exclusive to the embattled, either. You may see herds of deer or flocks of birds. Men in various uniforms and dress will dash from buildings as you thunder through their camp.
Battlefields can also be very busy places.
You may be fighting several mechs, over a dozen vehicles, several emplacements and jets or helicopters. Weapons may be one of the best parts. Gauss Rifles leave a spiraling corkscrew of cyan droplets and lasers are near white-hot at the center, gradually fading to green, red or orange. PPCs fire coruscating electric blue bolts. Missiles fly off in flocks, leaving smoky trails as they go.