Looks like you aren't installing recommended pacvkages. Have you disabled them in apt.conf or are you using "apt-get --no-install-recommends"
- Bug#988972: kde-plasma-desktop missing systemsettings, kw... Felicia Pacifica
- Bug#988972: Further dependencies missing Felicia
- Bug#988972: Bug#988996: plasma-desktop-data: qml-mod... Sami Erjomaa
- Bug#988972: Installed with --no-install-recommends Felicia
- Bug#988972: Installed with --no-install-recommen... Norbert Preining