Hopelessly complex? Most basic mechanics that are possible I think, way easier to follow than Sharpe Practice (which I like by they way).
Facing - not a massive issue, if playing with mates we just use the front of the figures facing to show the front. You just get a -1 if you have to turn outside of 180 degrees to fire. If playing with more rule lawyer types just make a mark either side so you have the 180 line running through the figure.