Williams explains that players generally pick a battleframe based on their individual playstyles. With the skill trees, a player can break that playstyle down even further. He gives the example of a Mammoth Dreadnaught vs. a Rhino Dreadnaught. The Mammoth builds heavier defenses, whereas the Rhino packs a heavier punch.
MMOs and other online games are trending away from the linear progression style to a more horizontal progression style. Firefall is heading in that direction, too. Will this be enough push Firefall toward being the next great online shooter? Red 5 hopes so.