I love plasma and now daily driving it for every system except games… Do agree I wish they’d make the splash screen more attractive, but like you said can kinda change it however you want so I just deal. Not a huge fan of the very pink lockscreen and I did change that. Once in a while it doesn’t catch the change and I end up with the default again for a session.
Proton is AMAZING! My issue was the window manager because I have dual monitors with different refresh rates I could just never get it to work right.
The other thing I ran into was that I couldn’t find anything that worked quite as well as Voicemeeter.
So until I get those two things figured out my gaming rig is still on Windows. I am amazed at how far we’ve come though. Even my work applications are compatible with linux now.