All I can say is...YES! Adding Sylux to boot would be nice. And if they want, they can remove ZSS (no hate towards her, but I would rather new characters than another version of a character we already have).
Raven Beak's winged phase is easily the hardest. He's more agile and none of his attacks during it can be countered, which means no opportunities to heal or really lay in the hurt.
