Any mod to feel yourself more "emperor" ?

Specifically, have more control over my vassals. For instance, prevent factions from declaring on one of my vassals and prevent my vassals from revoking any title of their own vassals.

I mean, I'm an emperor, have illegal vassal wars, absolute power, imperial administration, religious title revocation etc. etc. so I'm a bit upset when some random duke depose my viceroy, who is the guy I, the emperor, appointed, to rule this land in my name. Sometimes it's the other way around, the viceroy, all happy that he is with his new kingdom title will begin revoking everything in sight until I notice when the title goes back to me that his heir got a shitload of counties.