njb902 wrote:Numbers don't make a army, training does.
An army, by definition, is just a standing force. Presumably the Vehicons have some form of military training, but they get routinely slaughtered even with significant numerical advantage against the Autobots.
Predaking, by contrast, took on two Wreckers, and arguably some of the most powerful Autobots, and was pretty clearly dominant before their match was interrupted. We can make arguments about new toys in Transformers fiction here, but in the case of Predaking, Shockwave, and Optimus' new form, these are characters explicitly demonstrated as being more powerful than the average Cybertronian. Within the show itself, the evidence suggests an untrained animal is more powerful than a legion of military troops.
Logically, a legion of untrained animals, while uncoordinated and needlessly destructive, would thus be more effective against the Autobots. The Decepticons have the resources to do it, so why not make multiple duplicates of powerful Predacons, point them at the Autobots, and clean up the mess after the 'Bots are just Energon smears on the ground?