"variable signatures" is something that is often brought up. Some way to choose how your message is signed, perhaps on a case-by-case basis. I can see how this would be useful, especially in a theocracy. You might want your religious title used if you are addressing the realm on a matter of religious authority, but use a Marshal title when sending order to your army.
I'm pretty sure this one has routinely been turned down.
Though I like the idea, I can see why if it is a pain from the design perspective. Even if it wasnt, there are more important features to add aside from variable signatures I'd say.
