the corrals are useful to relieve women off the fields and send them to woods, you will need cav to gather food from the livestock, since they are faster than any other unit in hunting.
so far I've seen people using it as a late game strategy to mass up cavalry and protect cc from mini(but devastating, will be too hard to recover from that) raids on food economy
Is there a bug with replays?
I have a replay of me (Romans) vs Medium AI (Chinese). In the actual match, I won, but when replayed, the AI wins.
One thing I notice is that the workers I had assigned to collect stone in the real match are idle in the replay.