assamite and lasombra as the 'surprises' would have been my first bets given that many of them joined the cam while gangrel and brujah largely left.
Gangrel and Brujah left the cam in V5?
I'm still a bit out of date with V5,
Gangrel "left" in Revised edition when one of their Elders stood before the Inner Circle and told them he was packing up his clan and leaving, even though he did not have the authority to do so. As such, many Gangrel actually remained with the Camarilla even though the clan is no longer an official part of the sect.
The Brujah are Vampire V version where during the Conclave of Prague, an event where many high-ranking Camarilla were present to formulate an answer to the Anarch question, Theo Bell strutted up to Hardestadt and asked him if his shotgun tasted like cordite, and blew the elder's head off. Nobody knows why he did it, how the fuck he could kill a man as powerful and paranoid as Hardestadt of whether this was all part of Hardestadt's plot. Because of this many Brujah went Anarch, and because of what happened quite a few were more or less kicked out of the Camarilla.