Couple of questions...

What happens to your provences when your character dies?
Are they to be assisgned to a "new prince" or "man of the hour" type person on the death of a character??? Is this done by the Emperor or would it be voted on?

For example you take over three provences and then get a blade in the back from an assassin - who gets the proviences??? Especially if there is no "free agents" at the time.

Secondly there will often be times when your own troops will not suffice. For example a heavily fortified province that would require a significant army to budge - can the emperor call a sort of HRE "crusade" to take that province. Who then owns it. Also if/when we get excommed and some large army(s) come a hunting we may require to merge some armies to stand against them.

It seems to me that perhaps the Emperor would need to have a bit more power to make these things happen???

Please dont think this critisim as I think this is a great idea I was just trying to work the mechanics of it all....