For people who don’t really love the current Plasma Breeze splash screen, here is mine.
$ mkdir -p ~/.local/share/plasma/look-and-feel
Extract archive here.
Then:
Systemsettings > Workspace Theme > Look and Feel > select OMLx 3.03 > Apply
or
Systemsettings > Workspace Theme > Splash Screen > select OMLx 3.03 > Apply
Logout and login
Enjoy