Ah, I see - I misunderstood. I rarely play Bannor and I don't like Aristocracy, so I actually don't use Guardsman very often (that should change with 0.34). That "feature" sounds more like a break to me; logically guardsman should only come into play with assassins and no one else. The more I read, the more I am in favor of giving assassins an "assassinate" spell to bypass the tricky combat problems. That way, the Guardsman promo would only come into play when that spell is cast, and it would leave the more mundane defending to the archers.