Last but not least there is one important change for the 4.10 release. KWin?s window tiling capabilities which were implemented by a Season of KDE project a few years ago had to be removed again as the feature is seeing some bit rot and is completely unmaintained. Thanks to scripting it should be possible to implement window tiling again and provide it in time for 4.10. And work is going on to make that happen.
No announcement yet.
KDE's KWin Loses Window Tiling Support