Because Henry is an apostate and it makes him cry!
Or more likely because the peasants were growing restless and a banker needed to be appointed and she is willing to serve at the will of the Grand Prince. Strangely enough, they were fine without a judge being appointed.
As for Sint... While OOC I wouldn't mind taking them out with the allied north, IC Victus only views it as a potential future. As equal in potential as war with Nothoi. Neither he would necessarily want, but none of which he is willing to rule out as a possibility. He likes being prepared.