Hi @ANON_BM - you are welcome to stay on the current model. We can't have the two systems co-exist because a major part of the change is simplification of the notification settings for members. There would be no simplification at all if they were to co-exist... in fact, it would be more complex.
@Mark Neal - Yes, you will be able to subscribe to ALL posts across the entire Crowdstack site. That will be a new option... the key point being that you cannot slice and dice that by content type. It would be an instant notification about all new content on the site... and it would be off by default, so you would have to opt in to get those notifications. You will also be able to be notified about all new comments/replies.