Do we have a single page anywhere that discusses the boot/restart/updates experience listing what Fedora wants and what any issues are?
While Grub/Plymouth and the Gnome login screen can be themed with similar designs to show seemless transitions, using a black/no background in grub and plymouth also does this.
The boot process needs to be fast, but as the same process is used for updates, it does not necessarily mean that it will be fast.
With the current plymouth theme, the issues I see are as follows:
1. For a majority of the sequence, the Fedora logo is not present. There is an outline that is filling in. Whichever side of the branding wars you stand on this is sub optimal
2. The changes in animation are jarring. It is not smooth.
3. When there is no change in the animation there is no feedback that something is happening.
4. A filling logo does not really give adequate feedback on the boot process as it may stop for a longer period at some point (not sure if this one still happens).
Without going into a branding war, the simple issues can probably be addressed by creating a new plymouth plugin - with a dark background and with an element that animates without breaks or suggestion of "how long" it is left for the boot process to complete.