The current logic of AUH sent the summary email to a specific ML and the successful upgrade to the maintainer of the recipe. Will be better if the maintainer of failed recipe receives also the summary to notice that the his upgrade has failed.
Yes, absolutely. Also, the successful patches should be sent directly to oe-core list; if they pass the autobuilder and don't need amending, there's no reason not to merge them directly, bypassing the maintainers altogether :) Doesn't matter if 'From' is a robot :)
Patches posted to yocto@ list and available here: http://git.yoctoproject.org/cgit/cgit.cgi/auto-upgrade-helper/log/?h=devel