Many times i tried to use the custom battle generator to play a simili battle like Gaugamela or Issos, and i need a large field, plain and flat field without much ground feature.
And it is really hard to generate it.
If i select agricultural field, i often have a large stream in the middle

If i select desert, there are tons of hill, rough ground and things like that.
It is quite frustrating. The battlefield generator have too few options.
Also, there is no way to have a preview of the battlefield before creating it, and i cannot regenerate it until i found the perfect battleground !!!