The most important way BG3 can improve is by fixing the right-click to examine bug.
If you try to examine anything during initiative while another player is selecting a reaction, it breaks examining until the next load screen. Happens nearly every initiative in my four player campaign.
I ran various Ubuntu flavors, Mint, Pop!, and Debian on a wide array of devices for almost a decade before switching my gaming rig to EndeavourOS last year. I didn’t appreciate the snap package issues I was having, and the AUR is an excellent tool to have in the box.
I tried straight arch and probably would have stuck with it if I hadn’t royally borked up my audio during the pulseaudio/pipewire transition. I practically live in the command line, but I’m happy to let a well-appointed installer deal with the menial stuff, especially with the knowledge that I’ll inevitably have to reinstall someday. It’s not like there’s a shortage of shit to mess with or a dearth of dumb mistakes I’ll make. No matter what you choose, my best advice is to make a separate partition for both home and root. At the very least, that’ll give you the ability to easily evaluate different distros or reinstall without worry.
IME running newer kernels tends to be a boon for newer hardware and arch-based distros in particular are a good choice for gaming due to the rise of the Steam Deck. I still prefer Debian on servers and SBCs. Probably never going back to Ubuntu again. YMMV.