The campaign is actually really good and you get to experience the war from all three sides.
Saying that, your troops are more coordinated than they appeared last time around so there are improvements. While the new strategies work well, the Al still makes some corking blunders units often get caught up crossing bridges, while enemy generals always seem to rely on the same routes to attack you time and time again. Go up against US General Alexander - a specialist in base defence, whose inability to build tanks is offset by EMP missiles and cheaper Particle Cannons - and you've got yourself an interesting battle. For example, play as Chinese General Kwai - an expert in armoured warfare - and you can build tanks cheaply and earn powerful bonus abilities, his weakness being that he can't recruit artillery units and aircraft are expensive. Each general is an expert in a particular field, with bonuses and special units available depending on their skills. To bolster what would otherwise be a thin expansion, EA has introduced a new single-player mode called Challenge for all intents and purposes a homage to Street Fighter that has you, as your choice of general, taking on eight other generals one at a time as you attempt to become the mother of all battlefield commanders.