GloriousEggroll has released a new custom build of their Proton fork based on the latest Proton release.

Proton-5.11-GE-1-MF

Game fixes:
-Origin 5.11 hang fixed
-Origin fixes ported from Proton 5.0.9
-Path of Exile Vulkan Renderer in-game swap fixed (for radv you will need mesa-git for upstream graphical glitch fixes)
-StarCitizen hang fixed
-Divinity Original Sin 2 hang fixed
-Mount and Blade: Bannerlord launcher fix added
-Persona 4 protonfixes fixed (thanks Pobega)
-Warframe launcher download hang fixed (broke in 5.10, still does not show progress bar)
-Sea of Thieves proper websockets implementation patches added (no longer needs win7)
-Partial fix for Catherine -- game now opens and can reach menus. Hangs on new game, waiting on EVR implementation in wine
-Deep Rock Galactic (and other games) libffi dependency fixed that was causing various crashes -- note, please do not use steam-native if you are on arch, steam-runtime should always be used.

Build additions:
-'wmp9_x86_64' winetricks verb imported to protonfixes from upstream winetricks that allows wmp9 to be installed in 64 bit prefixes
-vkd3d updated
-dxvk updated
-FAudio updated

Build removals:
-Temporary removal of fshack, currently breaks MK11
-Temporary removal of esync, 5.10+ did a large rework of ntdll which broke compatibility with esync. The patchset needs to be rebased. It is currently disabled in staging.
-Temporary removal of fsync - fsync relies on esync. No esync = no fsync.

Known issues but playable:
-MK11 - no audio in custscenes -- needs SAR fixes, online matches broken
-Injustice 2 - no audio in custscenes -- needs SAR fixes
-Broken sound in Borderlands 3 Marcus new game intro -- can be skipped.
-Age of Empires II WMV videos don't play
-Street Fighter V intro videos don't play

Still broken:
-Seven (hangs on new game)
-Catherine (hangs on new game)
-Soul Calibur VI (hangs at main menu, needs SAR fixes)
-Nioh videos don't play, gameplay untested

Marking this as release as it has a lot of regression fixes and should be quite stable, despite the ongoing media foundation work and esync/fsync being disabled.

Download Proton 5.11-GE-1-MF from GitHub
Installation Instructions