GloriousEggroll has released a new custom build of their Proton fork with various fixes.

Proton-6.14-GE-1

-Issue with uplay services not connecting fixed from upstream wine
-FFXIV launcher certificate popup box spam fixed from upstream wine
-EVE Online launcher issue fixed from upstream wine
-Added d3dx11_42 protonfix for Metro 2033 (thanks likashoracek!)
-Added d3dcompiler protonfix for L.A.Noire (thanks manueliglesiasgarcia!)
-Added d3dcompiler protonfix for HighFleet (thanks Alistair Leslie-Hughes!)
-Fixed shutil missing from protonfixes which broke set_ini_options (thanks djazz!)
-Added Microsoft Flight Simulator 2020 fixes from proton
-Re-added revert for 97afac469fbe012e22acc1f1045c88b1004a241f which breaks controllers in some unity games ( https://bugs.winehq.org/show_bug.cgi?id=51277)
-dxvk updated
-vkd3d updated
-wine and wine-staging updated to 6.14

Download Proton 6.14-GE-1 from GitHub
Installation Instructions