Some of the firstboot screens (Firewall, SELinux) which really need some explanatory text, otherwise all the users can realistically do is click through them... The other screens already have some explanations, but could use some more.
Each screen belongs to a different project, so you'll need to file a bug with each one if you want the maintainer to see it. "firewall" and "selinux" are s-c-securitylevel, which is where I have reassigned this bug. "date and time" is s-c-date, "display" is s-c-display, "sound card" is partially s-c-soundcard. All the rest belong to firstboot, but I own that too so I know to fix it.