MC does not work on wayland yet (or didn't as of a few weeks ago), and neither does most nvidia hardware with the proprietary drivers. Regardless of what the Freedesktop.org/Gnome crowd may think Wayland will not be ready for prime-time in the near term. Maybe in time for the next Debian Stable. Maybe.
Don't mistake me, I'm a huge fan of Gnome, but you only have to boot into a Gnome Wayland session on the latest Gnome (3.16) and see how wonky everything is at the moment (especially with non-gnome software). Unless you have NVidia hardware with the proprietary driver, of course, in which case it doesn't work at all (white screen of death, etc.). Since 3.16, they've been piloting running GDM with wayland by default, and it generated a huge amount of issues/friction just for the login screen which they have complete control over.
In my view, wayland is somewhere between alpha and beta right now, and it will be years (my guess is more than one less than three) before it becomes a useful replacement for X11. And most linux desktops don't support wayland robustly ATM, so targeting wayland for development right now would effectively be saying "use gnome or else, and here's hoping you don't want to use a newer nvidia graphics that nouveau doesn't really support yet."