Often people search the server list for duels or want to avoid them, and I think that duel mode should be indicated in the title (EDIT: Not title: "quick-list", i mistyped) of the server as well as hotseat and duel mode. I think this is important because it quickens the process of choosing servers and makes toribash a more streamlined experience.

Also:

maybe down the line add the duel amount that is activated in the server in the listing