Harald pointed out to me today that dracut built images have a screwed up plymouth experience.  All the messages normally redirected to boot.log show up at the same time as the text mode progress bar, creating tons of ugly noise all over the screen.

I looked into it a bit.  Plymouthd isn't getting started with the "redirect messages to boot.log" argument.

In 10plymouth-pretrigger.sh there is a

[ -x /bin/plymouthd ] && /bin/plymouthd

that line should have a --attach-to-session argument added to it.