There are definately some changes in the AI for C&C 3. That's for sure. That ole mass up an huge army and blitzkreig the others doesn't work like the days of old.
A couple of tips I've come across...
When playing NOD, uses your fanatics. Lots of them.
Also when you build your base, make use of your guns, and lasers. You'll need em. GDI's APC's are a real pest.
Lastly, garrison everything you can. GDI will. You will have a hell of a time going through an entire city of garrisoned buildings....
Trust me.
