In a nutshell, the new features are an improved AI and a better Multiplayer experience, right? Or what else can convince previous owners of the iOS version to spend another 10 bucks (or whatever the price will be)?

I am almost at the end of my first playthrough of the vanilla campaign (on iOS) and love every minute. Slowly I begin to understand how the Blitzkrieg has worked - too late, of course, so I achieved mostly minor wins and only a couple decisive ones. Most of the time I didn't save during the scenario...