@wendell As you have an ARC card in hand now it would be quite interesting how DXVK on Windows might help. Vulkan works well on ARC and DXVK is really fast, so it might be worth a try if it can “fix” some problematic games. It seems to be a pretty “easy” drop-in except for overlays maybe.
Some notes about windows and DXVK: Windows · doitsujin/dxvk Wiki · GitHub
Just did some tests (not on Arc though) and just throwing the DXVK DLLs next to the exe of a DX9 or DX11 game seems to work and work really well, surprisingly easy, maybe ARC users would just need some tool that throws those next to games automatically and basically just enhances performance with a single click. Does not work for every game though tested tell my why for example and it outright crashes every time.