There is one way to get all owners notified of the groups actions, file a lawsuit and get it class certified. Notification must then take place to all participants in the class. In this case it would be all owners.
That was the original suggestion - to collect roof repair and various other fees from Marriott - but the fear was that it would be too expensive. As well, Dave, John, Dean and a few other timeshare-savvy people offered their opinions about how difficult it would be to win a suit, by outlining what requirements would have to be met in order for the "concerned owners" group to be able to succeed, and the goal became reaching the entire ownership base in the hope that negative publicity or owner outcry would convince Marriott/MVCI/the MAOC BOD to kowtow to the "concerned owners" group's demands (which appeared to conflict with the bylaws of MAOC and the management agreement between MVCI and the MAOC BOD.)
Naturally following the threat of a lawsuit that began this public thread, Marriott et al did not agree to informal or relaxed requests for owner addresses or any other negotiations, and then the goals became removing the sitting BOD and trying to get the postal/email addresses of all owners. The thought process appeared to be strength in numbers, that an ownership majority would side and act with the "concerned owners" group if they only knew whatever damaging info that group is holding. But minus competent legal counsel, the few attempts made to oust board members or collect contact info were unsuccessful.
In between all that, more and more suppositions were gleaned from the limited info released to this thread by the principals which allowed Marriott et al to be proactive and head off every challenge. Throughout, every one of Marriott's actions has been taken with the utmost legal protections, obviously an effort to defend themselves if/when any of this ever actually goes before a judge.
I agree with you and have for a while, that there won't be a resolution unless and until that threatened class action suit is filed. But if I were an owner at MAOC and had access to this thread, I'd have the opinion that such a suit would be impossible for the owners to win. Too many educated opinions have been offered here by extremely savvy timeshare owners, to counter every argument offered by the "concerned owners" group. If these smart people are able to recognize the unreasonableness of the group's demands, then certainly Marriott's legal department will have no problem successfully defeating the challenges.