I remember some interesting H6 battles on a loooong bridge. So:
Make battlefields customizable in size! Right now the standard 17 X 11 grid is used. I see no reason to hard-code them to that size. Again for such a “trivial” thing the bang you get for the buck is quite good.
The idea is to Allow different battlefield sizes depending on the map tile the battle takes place. In this way the map/mod creator can choose the size of the battleground. If he does not, default 17X11 gets used.