Haus Rules - Mobile Artillery
This is another Haus Rule that has a direct change to the rules as published. The Mobile Artillery rule (or, as they are more commonly know as, Self-Propelled Artillery) is very harsh indeed. The ability for it to move 1 and fire in effect makes it similar to a very devistating infantry. It is simply too much and find it really unbalances any game it is in.
In order to take them to a more sane level here is my Haus Rule...
Unit may either Battle or Move 2 hexes.
This keeps them from getting too heavy too soon. As it is, they can still move twice as far as Artillery, so they will get themselves into a good firing position faster. Try it out.