A public discussion will make me and the rest of the users more informed. Waiting a year to retrospect, or wasting a million dollars in legal fees (and the time to get this to a conclusion) are very unoptimized ways to get to the facts.
Transparency is key in such a problematic case. see how forced transparency has now forced the entire leadership of the American DNC to resign once the people found out what the people in charge are doing in their name and why. Also see the 3 people fired from the Tor organization. I think Free Software, on the moral+social side of it, needs transparency to run correctly.
If I only look at the current state of the project(s), I see mainly github activity and about half the number of IRC users on #nextcloud then on #owncloud. It’s impossible to judge on that. I think that if the co-founder is stepping out “for moral reasons” he should list what those reasons are. “Getting richer than I would have if I stayed” doesn’t count as a moral stand, I think.