Yes, we release updates and then send out email notifications a little later based on the number of new bugs introduced in the new version. No sense in sending out an email to upgrade to the newest version when there are new bugs.
If it's possible to upgrade the Datafeedr plugin here WordPress Admin Area > Tools > Datafeedr, then I would recommend doing it that way. That way all permissions are set up properly.
No, this will not create any problems. We recommend doing it that way.