This might have been asked and answered previously, if so my apologies.
Is there a mod/function/trick out there to grant vassals independence without forcing them to revolt first (and thus losing prestige, etc. by surrendering)? I inherited some duchies which are far away from my main lands, and rather than spend the time and effort keeping them in line I'd rather just grant them independence and make independent duchies out of them. A "Release from oath of allegiance"-function granting independence could be useful in this sense. Thanks!