I would recommend against installing ppas in general.
I think that Kubuntu/ubuntu Noble is on a pretty recent stable kernel as is. There would be something even fresher in the HWE track, dunno if that exists for noble yet. The DXVK version is up to Proton (so Proton-GE would be slightly fresher).
The Mesa version, I’m not sure where that comes from. You have an OS installed copy, you have a flatpak/snap version, but aiui Steam Runtime and/or Proton also likes to bring its own version.