Just switched to the newest PopOS! and I **ing love it. Works wonders with my 6700xt. Haven't played many games but Last Epoch and Hearthstone has been working just fine and for workflow, ohh my guaarrrddd, absolutely love the "Tile Windows" feature and the ease of moving stuff around to different workspaces just using shortcuts <3 <3 <3 <3 <3 <3 <3 <3.
. However, I stand to make a correction: With Manjaro, the USB pen kept failing to boot the live enviroment. Same pen was fine when making Ubuntu and PopOS LiveUSBs but for whatever odd reason my Manjaro kept failing to boot, getting stuck reaching graphical desktop or something along those lines, cant remember the exact wording. Would have loved to give Manjaro a run as I understand it, that Distro is faster than PopOS to get Mesa updates? could be wrong? again I'm a noob, but a happy noob enjoying the freedom
I've installed one Ubisoft game (AC Origins) via Steam which in turn launched UPlay and from there into the game. When I tried to install UPlay on Lutris on Manjaro it didn't work, but I didn't tinker so am sure it could have if I'd spent more time tinkering (and therefore less time playing). Steam seems to be the closest to out of the box running though.