Zac and Phil discuss the potential banlist changes in the Legacy format. They analyze the data from the community and break down the top cards that players want to see banned or unbanned. They explore the idea of a mass exodus from the banlist and how it could create a more diverse and interesting format. They also discuss the possibility of changing the philosophy of the banlist and taking more proactive action in shaping the format. Overall, they emphasize the importance of creating a healthy and dynamic metagame in Legacy.