I know I'm necroposting, I just installed Fedora Cosmic Atomic today and I'm happy with it
Definitely a steep learning curve for me (e.g. where did dnf go, what's the difference between rpm, rpm-ostree, snap, flatpak, etc.) but things are working pretty well.
I even set up some kernel parameters and it made much more sense this way.
I tried gnome first, then KDE, and I'm feeling at home on Cosmic.