Ronan your map looks real nice. But i thought about a little more open area , with about 5 houses and no hills in this flat area. Like a flat ring around this houses .... you can call it farm.
Around this flat ring are some medium hills. But there must be some room between the houses , and the hills, so that it would not be like around the farm were archers that shoot down. The hills would be a little more away. Archers would have a flat shoot to the houses from there , not down. Starting points for the 1. team were behind some hills, and the other in the farm.
There would be trees here and there around the farm , that could create some cover for infantry against cav, or archers. Maybe some little rocks too. But not so many and not everywhere. Maybe with a river at the farm.
That would be nice :-)
In simple words : A flat ring nice for cav , with some cover as trees and rocks , around a farm , and around this flat ring some medium hills, not too high.