The idea of "only one desktop" will lose me as a user unless Cinnamon is chosen. I imagine others would have similar feelings possibly with Cinnamon replaced by KDE or one of the others that are available. I.e. don't take away choice. The removal of choice/configurability from Gnome is the reason that I dumped Gnome in favour of Cinnamon and Id have no compunction dumping Fedora as well if choice disappears.