I actually have trouble with Easy AI despite playing other RTS games. My point of reference is Zero-K (Total Annihilation) and War for the Overworld (Dungeon Keeper). I'm a mid-ranked player for ZK's online multiplayer, but it's an extremely different RTS.
So far I'm trying to figure...
1. What is the advantage if any of raising livestock in a Corral vs building more Fields?
2. If I cancel or destroy a building, how much of the cost is recovered?
3. How much better do my units perform given the different formations?
4. How does the Trader unit affect prices on the Market?
I didn't spend any effort building walls while playing as Gauls or Britons.
5. Are walls important for defensive play as Romans?
6. How do I handle extremely long ranged archers (vs Seleucid?)?