Mostly I think that one should stick with default stats for MP, but one thing that should be changed for EB MP (and something I griped about in the past) was the incredibly high price of elephants which led to armies that used them being far too gimped, or alternatively to armies just sadly NEVER using elephants.

Barbarians are fine, though. They aren't meant to be balanced, and with chariots anything can happen, including a stunning victory.

Oh, and yes, I still exist.