It seems that every new/upgrade plugin/theme release, we will be the tester to feedback on this not work that not work, and thereafter next version will release.
I confessed that am a great supporter of WordPress & WPMU Dev, but somewhere need to be done so that it will have less disruption to our WordPress site.
It is good to have auto-update for new release of plugins/themes but that's always pose a risk that we may get into disastrous if the new release has BUGS. So, may I suggest to have a button for us to revert to previous version if the latest upgrade of plugin/theme is not working.
Long Live WPMU Dev !