Same strategy, new visuals, but some new thinking...
The new thinking goes into defense versus offense. In most other strategy games you build up defenses, wait for the big rush, then take your time in rebuilding and going on the offensive. With this one I tried the normal formula and was plesantly surprised that they kept coming and look for holes in my defenses. The AI is much improved and lends to new strategies to incorporate to win. Once i'm through with the single player campaign, i'm sure it'll be back to the old grind online, but it is a little refreshing.