Unity has proven to be a huge mis-step for Ubuntu. There is an equal amount of consternation regarding GNOME3-shell.

I would strongly recommend that Fedora and Red Hat consider using Xfce as their default desktop.

The majority of Fedora/Red Hat users, use GNOME on a computer workstation. I think Fedora and Red Hat have to choose which platform they feel is their niche market: touch pads, or workstations.