I don't think the opt out numbers will show a true picture, as there will be a lot of people who just won't bother with ranked events as they don't want to be part of it. If something is flagged as a ranking points event, I think I'll probably skip it. You could end up with a divide where ranked events will be seen as WAAC events.
The community nervousness comes from seeing the effect of he system on the fantasy scene. Still, looks like the points system is coming in regardless, so academic really.