I have been patiently waiting so far but...
apt-get -t experimental install kwin-x11 plasma-desktop plasma-workspace
breeze plasma-integration
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
plasma-integration : Depends: qml-module-org-kde-qqc2desktopstyle but
it is not installable
E: Unable to correct problems, you have held broken packages.
apt-get -t experimental install breeze
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer
required:
accountsservice breeze-gtk-theme cracklib-runtime fonts-hack-ttf
fonts-oxygen ieee-data kde-config-gtk-style
kde-config-sddm kded5 khotkeys khotkeys-data kmenuedit kwrited
libaccountsservice0 libcrack2 libkf5activitiesstats1
libkf5jsembed-data libkf5jsembed5 libkf5people-data libkf5people5
libkf5peoplebackend5 libkf5peoplewidgets5
libkf5xmlrpcclient-data libkf5xmlrpcclient5 libkfontinst5
libkfontinstui5 libplasma-geolocation-interface5
libpwquality-common libpwquality1 libscim8v5 libtaskmanager6
libweather-ion7 libxcb-record0 milou oxygen-sounds
plasma-desktop-data plasma-discover plasma-discover-common qdbus-qt5
qml-module-org-kde-activities
qml-module-org-kde-extensionplugin qml-module-org-kde-kholidays
qml-module-org-kde-kwindowsystem
qml-module-qt-labs-settings qml-module-qtwebkit
software-properties-kde user-manager
Use 'apt autoremove' to remove them.
The following additional packages will be installed:
breeze-cursor-theme kde-style-breeze kde-style-breeze-qt4
kdeplasma-addons-data kwin-addons kwin-style-breeze
plasma-dataengines-addons plasma-desktop-data plasma-runners-addons
plasma-wallpapers-addons
qml-module-qtquick-controls-styles-breeze
Suggested packages:
orion-gtk-theme
Recommended packages:
kde-style-qtcurve plasma-workspace
The following packages will be REMOVED:
kde-plasma-desktop kinfocenter plasma-desktop plasma-integration
plasma-widgets-addons plasma-workspace sddm-theme-breeze
The following packages will be upgraded:
breeze breeze-cursor-theme kde-style-breeze kde-style-breeze-qt4
kdeplasma-addons-data kwin-addons kwin-style-breeze
plasma-dataengines-addons plasma-desktop-data plasma-runners-addons
plasma-wallpapers-addons
qml-module-qtquick-controls-styles-breeze
12 upgraded, 0 newly installed, 7 to remove and 359 not upgraded.
Need to get 29.7 MB of archives.
After this operation, 42.7 MB disk space will be freed.
Do you want to continue? [Y/n] n
Abort.