Complex sentence: After improved KDE versions were made, he switched back to KDE Plasma Desktop 4 but soon switched back to GNOME 3 stating that "it has been getting less painful" with Frippery and gnome-tweak-tool which he suggested to be merged into GNOME.
Split into simpler sentences: After improved KDE versions were made, he switched back to KDE Plasma Desktop 4. However, he soon switched back to GNOME 3 stating that "it has been getting less painful" with Frippery and gnome-tweak-tool which he suggested to be merged into GNOME.