I really like it as well. I did three major version upgrades so far and they have been flawless. I also really like Flatpak, finally a way of easily installing something on Linux without breaking half of the system because the application you wanted to install uses libfoo 2.0 and not libfoo 1.9.9-patch-1337. With my atomic desktop applications that worked yesterday also work today. Things don’t randomly break all the time.
The future of Fedora Atomic also looks exciting; Timothée Ravier is working on sysexts which are a way of installing applications without ostree layering. I could remove most of my ostree layered packages with that.
The source code is freely available and GNOME isn’t beholden to Canonicals decisions. If the Ubuntu devs want to keep X11 around nobody can stop them from maintaining it themselves, or pay somebody from the GNOME team to do it for them.