To be honest, this OST is below average at best. It doesn't have the charm or the feel of the original AOE2 theme, which just makes you patriotic to fight off an epic battle. In comparison, this one seems too stretched, muted and even boring at times. There one isn't even close to the original! Not impressed, sorry.
I respectfully disagree and suppose it mainly is your nostalgia speaking! This theme is much better in terms of music and arrangement, has an excellent medieval vibe to it and feels much more natural than the Aoe2 theme (Still slaps tho)