First, let's start start with some new tactics the AI will use:
-better use of Spies: besides stealing infantry and vehicle plans and powering your base down, the AI will also reset your shroud by infiltrating the radar and stealing half of the cash you own by infiltrating your refineries. Guard them well with dogs!
-distraction: what is worse to see when you've just moved your base defenders to defend those precious Oil Derricks, and then to notice that the enemy is bombarding your base with artilleries from the other side of your base? Not much
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-APC rushes: the AI will sometimes rush you with 2 APC's, which only one has infantry inside. What infantry may vary, but it's either Engies, Tesla Troopers, Ivans or (when vs Cuba) Terrorists. One advice: kill them before they are in your base
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More info will be available when time advances...