A big, but easily fixable problem in the demo, is the distance units are from each other when you drag them out into a line. If you try to make a solid formation of pikemen (composed of 2 or more units), the units are positioned so far away that they are almost guaranteed to be flanked (guys can just wrap around into the gap between the two units). This would (probably) be easy to fix, but would be incredibly useful for any army with defensive troops.