kde-frameworks/kdbusaddons is not needed. virtual/jpeg - should be needed unconditionally, as plucker generator uses it directly (or should be hidden under plucker use flag together with dependency on sys-libs/zlib). BTW, it makes sense to rename jpeg use flag to exif.
Yes, that makes sense. Removing kdbusaddons requires upstream patching though.
DBusAddons dependency removed upstream.
Thanks for your report, fixed with 17.04.0-r1, git commit 516e8b74f711afc33d6d38a6f850f3e28d2ad917