Just got latest update to f31 from [copr:copr.fedorainfracloud.org:zawertun:kde]. Once again, trying kde over wayland. Finally, it appears to be usable! Previously when I tested there were 3 showstoppers: 1. No multiple desktops 2. Bad results for hi-dpi 3. x2go didn't work and I need it
Today it looks like all these issues are resolved :)