soee@TachikomaDell:~$ LANGUAGE=C sudo apt full-upgrade -o  Debug::pkgProblemResolver=true 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Starting pkgProblemResolver with broken count: 3
Starting 2 pkgProblemResolver with broken count: 3
Investigating (0) muon-discover [ amd64 ] < 4:5.5.3-0ubuntu1~ubuntu16.04~ppa2 -> 4:5.5.3a-0ubuntu1~ubuntu16.04~ppa1 > ( oldlibs )
Broken muon-discover:amd64 Depends on plasma-discover [ amd64 ] < none -> 5.5.3a-0ubuntu1~ubuntu16.04~ppa1 > ( kde )
  Considering plasma-discover:amd64 1 as a solution to muon-discover:amd64 3
  Holding Back muon-discover:amd64 rather than change plasma-discover:amd64
Investigating (0) muon-notifier [ amd64 ] < 4:5.5.3-0ubuntu1~ubuntu16.04~ppa2 -> 4:5.5.3a-0ubuntu1~ubuntu16.04~ppa1 > ( oldlibs )
Broken muon-notifier:amd64 Depends on plasma-discover-notifier [ amd64 ] < none -> 5.5.3a-0ubuntu1~ubuntu16.04~ppa1 > ( kde )
  Considering plasma-discover-notifier:amd64 1 as a solution to muon-notifier:amd64 3
  Holding Back muon-notifier:amd64 rather than change plasma-discover-notifier:amd64
Investigating (0) muon-updater [ amd64 ] < 4:5.5.3-0ubuntu1~ubuntu16.04~ppa2 -> 4:5.5.3a-0ubuntu1~ubuntu16.04~ppa1 > ( oldlibs )
Broken muon-updater:amd64 Depends on plasma-discover-updater [ amd64 ] < none -> 5.5.3a-0ubuntu1~ubuntu16.04~ppa1 > ( kde )
  Considering plasma-discover-updater:amd64 1 as a solution to muon-updater:amd64 2
  Holding Back muon-updater:amd64 rather than change plasma-discover-updater:amd64
 Try to Re-Instate (1) muon-discover:amd64
 Try to Re-Instate (1) muon-notifier:amd64
 Try to Re-Instate (1) muon-updater:amd64
Done
Calculating upgrade... Done
The following packages have been kept back:
  muon-discover muon-notifier muon-updater
0 upgraded, 0 newly installed, 0 to remove and 3 not upgraded.