One interesting aspect of this is that it will make it more likely that a duchy could declare independence from the realm as long as it remains within the empire. with a lowered strength and size for each realm, declaring independence could essentially amount to splitting a realm in two. Would the empire allow this action as long as the new realm declares allegiance to the empire?
Also, regarding the infiltrators that will inhabit the dark isle, do you plan to set up an laws governing their treatment if caught by another realm within the empire? essentially if you say they cannot be deported or executed you create a heaven for assassins, but if you allow those actions you will be starving the dark isle of valuable nobles.
