This is just a papercut for me that can also be solved with package.provided or a custom @xfce set, but:
The stable xfce4-meta package now pulls in xfce-extra/thunar-volman unconditionally. The thunar-volman package, in turn, pulls in xfce-base/thunar[udisks], which is a dependency I never had in xfce-4.12.
That one USE dependency is particularly annoying because it starts pulling in gnome stuff that needs other gnome stuff that needs other gnome stuff that eventually pulls in elogind, which otherwise I can do without.
What would you think about propagating the "udisks" flag up into xfce4-meta to make it optional?
I'd rather remove the package altogether. So far people demanding support for their 10 different minimal xfce configurations are far outweighing the benefit of having it at all.
*** Bug 699734 has been marked as a duplicate of this bug. ***