Each faction now has several different specialized generals, primarily for multi-player use, which is what the expansion pack seems geared towards anyway. The "basic" version of each faction is still available. Each general has certain advantages and disadvantages over the other generals within the same faction. There is for instance a China Tank General, which have tanks as his advantage, but don't think you're going to win just because of that - other capabilities have been taken away. It's all quite carefully balanced, although the online multiplayer statistics show that most GLA generals are currently at a slight advantage. I'm sure this will be corrected in a future patch though.

PROS:
* A naval "presence" has been introduced, although you can't directly control the naval units yourself. There is a carrier and a battleship were you can do aerial bombardment and artillery bombardment respectively.
* Greatly increased variety due to multiple new units and capabilities, and new specialized generals.
* Even better online multiplayer capabilities.
* 3 new single-player campaigns (1 per faction - Total of 15 new missions)
* Subtle enhancements to game engine - e.g. Aircraft will automatically defend the area nearby the airbase.
* Superweapons now appear on the right side of the screen with the other general abilities, so you don't actually have to locate your superweapon to fire. If you have several superweapons ready to fire, a number inside the superweapon icon will show the number of superweapons that are ready to fire.

CONS:
* Still no real naval units. I really miss this from Red Alert 2.
* You can no longer do ladder-play or ranked play with any user-created maps. Ranked play is only possible for certain maps distributed with the game. Ranked games are clearly marked before you join though.
* Same problem with difficulty level as C&C Generals. Easy is way too easy, Normal is even easier than Generals, and Hard is too hard.
* Still not possible to skip the "cut-scenes" at the start of each mission.

I give this expansion 5 stars!!! It's a great enhancement, and if you loved C&C Generals, you'll probably love the expansion pack even more. It greatly enhances online play. This expansion pack pretty much makes it a new game.