I would personally be okay with discussing the appointment processus in public, but I don't see much value in having a public foundation-l-type discussion on whom we appoint
Agreed. The question of what the process is going to be is a separate question to the one of who will be appointed to the chapter seats. We're only on the former at the moment and there is no need to restrict that (although I would advise against trying to form a consensus of the general community or holding a general vote or whatever - the final decision on what to forward to the WMF board should be made by the chapter boards). Who gets to take part in appointing people is part of the process and shouldn't be discussed at this stage (otherwise we'll end up with discussion split over multiple venues).