SiphonX used to provide match stats that showed win ratios as far as Axis/allies by map being played.
It was pretty helpful to players and mappers. In the past the numbers had a lot of variation to them. Meaning, one time Axis would be strong on a map and the next time it was allies favored.
So if it is a lot of work and you only have a small sample size it may not be worth it. But I think you already are doing it anyway from what I have seen.
EDIT:
Here is an example:
