Comment # 2 on bug 977364 from Wolfgang Bauer

For the record: I installed phonon-backend-vlc (0.8.2-3.2 from the update repo)
in a Leap 42.1 VM now, and Amarok still works fine using the vlc backend (even
with vlc from Packman).

So the update is definitely not broken.

I do get the same warnings as you mention, but they are harmless.
They are likely caused by missing features of the vlc backend (no support for
AudioDataOutput and angles) and totally unrelated to the update, see
https://community.kde.org/Phonon/FeatureMatrix .
(and no, they don't mean that "amarok can not connect to phonon any more"...
;-) )

Did you logout/login since the update to make sure everything is initialized
correctly?