In York (Toronto) the PCs were a mix of old and new, and the establishment characters drew the new ones in. However, the establishment characters also got more screen time. Just easier to go to.
When we did Paris, I changed the questions on the playbooks so they said things like “how many centuries have you been here” or “why did your parents send you here from Haiti when you were 9.”
No newbs in Paris. Game ran tighter.