Lets hope this is our answer :)

It's a beta so they will have plenty of chances to improve or ruin it! ?

So I had 80+ messages from D2M landed in my mailbox this morning, where it seems to have sent me a notification of everybody accepting every individual meeting.

Is there anyway to configure this to be less spammy?

The profile has an option that notifications should can be immediate or as a daily digest, that was set to the digest, but still got the flood of event notifications.

Is this something bound to the roles?

I see your point but cannot see a way out of it, at least not just yet. I will keep trying and looking.

At first glance I think they haven't got around to it. So I set up a rule/filter on my email account that anything from down to meet with new rsvp in the title went to the bin. Will probably do the same for those with you are signed up to.

I've pinged the developer with some suggestions.
1) The ability to assign a host/co-host to an event and only for those members to get notifications.
2) The ability to accept an event series and consolidate the resultant notifications.

I've also sent them an email and trying to get them to look into it, not sure its cause we are all "Event Organizers" ?

Yeah, having this create a digest rather than an alert on every acceptance would be great and (ironically) is what my options are set to ? Smells like a Buggy McBuggerson