Royal is going to switch his vote, so that's one even if M. Gustave lied to people last night. If Gustave is really switching too then Duke would be silly not to join in the switch, leaving only Margot voting for Writer on the revote.
It would be legendary if someone on this side switched too thinking no one from the other side was switching and we got LOL woops rocks. Although knowing my luck I'll be the one getting rocked out.