> Secondly, they are mixing their own binary packages with binary packages from Debian and Ubuntu without rebuilding the latter. This creates something that we in Debian call a "FrankenDebian" which results in system updates becoming unpredictable
This is interesting because Debian itself encourages derivative projects to use their binary packages[1]:
> For those derivatives that re-use Debian binary packages, add some source packages and modify some source packages, where possible we encourage them to use standard Debian mirrors and add a second repository containing only the source and binary packages that have been added or modified.
Or maybe they don't encourage that behaviour but still give guidelines in case you want your derivative to work that way? I'm not 100% sure.