For what it's worth, you can have all this in Plasma 5:
* The "Switch to adjacent workspace" and "Move Window to adjacent workspace" actions are not bound to shortcuts by default, but you can do so via System Settings > Shortcuts > Global Shortcuts > KWin.
* Alt+Left and Alt+Right for drag and resize, but can be configured to be the same as in Unity in System Settings > Window Management > Window Behavior > Window Actions.
* Quick-tiling (full, half, quarter) is enabled by default.
* The "Switch to adjacent workspace" and "Move Window to adjacent workspace" actions are not bound to shortcuts by default, but you can do so via System Settings > Shortcuts > Global Shortcuts > KWin.
* Alt+Left and Alt+Right for drag and resize, but can be configured to be the same as in Unity in System Settings > Window Management > Window Behavior > Window Actions.
* Quick-tiling (full, half, quarter) is enabled by default.