Migrate traditional Distribution Groups to Office 365 Groups

I don't see any benefit to these new groups. We don't want people joining a group just because they feel like it - that's great for Yammer but not for distribution lists designed by management to send messages to controlled lists of users about topics which specifically only apply to a subset of our users. And I see nothing about these new groups which indicates it makes it easier to allow us to send email notifications to a designated user when it is their turn to take action on a workflow in SharePoint. (But then, from what I've seen, I wouldn't be surprised to find that we're actually considered dinosaurs for continuing to use SharePoint workflows and InfoPath forms and that Microsoft is probably going to do away with those features before too long.)