This argument is completely inane.
The work is in regards to plymouth and GDM. This has NOTHING TO DO with your DE (Gnome, KDE, etc.) GDM is *INDEPENDENT* of gnome DE and is roughly equivalent to KDM no matter how you look at it.
In other words, keep using KDE if you like. You can just as easily run GDM/KDE. IT WORKS.
Nobody is shutting out KDE.