Another small release in terms of noted changes but still an interesting one, with today seeing Proton 5.0-3 for Steam Play being made available.
For those who really can't wait for the upcoming Linux release of Metro Exodus, you can now run it in Proton in the Direct3D 12 mode. Nice to see support for that making it in so quickly and it will be interesting to see how it fares against the aforementioned Linux release.
The rest of this release are bug fixes, with the major fix being a "high polling rate mouse regression" I saw a number of complaints on so Proton 5.0-3 should behave a bit better. On top of that there's also a fix for crashing launches with both The Walking Dead: Saints and Sinners and eFootball PES 2020 plus Automobilista being unable to load some assets also being fixed up.
You can see the full Proton changelog here.
If you don't see it turn up yet in your Steam client, you can try restarting as that usually gets it to appear and make sure you have Proton 5.0 installed in the Tools section of Steam.