As a first entry login manager current sddm theme in Fedora 22 is not a non tech user easy entry. As pointed on recent phoronix article, one of the low points on Fedora Plasma desktop is the login manager. As a common user, is basically not intuitive enter a login name and password. For a computer regular user, this is a no brain. So the proposal is make default plasma sddm theme as default, changing artwork to fedora standard, but using the user selection. At same time, a power user that needs deal with several users and systems on network logins, have the current user + login dialog to change, if the user selection is not suitable for their needs. The rational side of this is, a power user or sysadmin knows how to change and even decide best strategies for the machine, but a new user, coming to Linux, will just don't know how to deal, considering that in all other operational systems or in GDM it has a entry user image point.
So in short, we'd have one Fedora theme with user list (reskinned upstream Plasma default) and one without (current theme reskinned/updated for F23)? That makes sense.
Working on this today, while updating to sddm-0.11 (part of bug #1209689). The userlist variant I am using intially is simply the sddm 'breeze' theme, with standard fedora wallpaper swapped in. Creating a sddm-breeze subpkg from plasma-workspace to contain it.
Proposed as a Freeze Exception for 23-alpha by Fedora user rdieter using the blocker tracking app because: Polished F23 sddm theme artwork (the existing theme works, but has received a fair amount of criticism for lacking polish, this one is much nicer)
Once this lands in updates-testing, to test this (assuming you have sddm installed and enabled already): dnf --enablerepo=updates-testing install sddm sddm-breeze and reboot, you should see the nice new userlist-enable breeze-inspired theme.
sddm-0.11.0-1.fc23,plasma-workspace-5.3.2-10.fc23 has been submitted as an update for Fedora 23. https://admin.fedoraproject.org/updates/sddm-0.11.0-1.fc23,plasma-workspace-5.3.2-10.fc23
No point having this proposed as an Alpha FE now Alpha has been approved.
Package sddm-0.11.0-1.fc23, plasma-workspace-5.3.2-10.fc23: * should fix your issue, * was pushed to the Fedora 23 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing sddm-0.11.0-1.fc23 plasma-workspace-5.3.2-10.fc23' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2015-13028/sddm-0.11.0-1.fc23,plasma-workspace-5.3.2-10.fc23 then log in and leave karma (feedback).
sddm-0.11.0-1.fc23, plasma-workspace-5.3.2-10.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.