The renaming was accepted, there is now a package KDE:Qt5/qt5-creator. But it is disabled ad KDE:Qt5/libqt5-creator seems to remain the default. I don't know why my request got accepted under this cirumstances. Maybe renaming it to qt-creator instead of the wrong name qt5-creator would be a better idea. We should defiantly get rid of either libqt5-creator or qt5-creator. The current situation is insane.