Additionally, Saeculo, and from what I hear, Ravendon both tried to give Merlin a way out before the majority of these revelations. He could have retired as Duke and still retained influence within Coria. Perhaps even gone away, reformed his plans and tried again. Now, I'm doubtful as to whether Coria's allies would accept such a character being in a position of influence.
He's pretty close to untouchable if he doesn't end up killing himself or voluntarily stepping down. He'll be a Royal, and thus unbannable, and he's a Duke. The options that do exist for getting rid of him are all somewhat painful.
