If EOS runs well… then there is no question anymore:
Install Arch the Wikiway, perhaps with XFCE. In my experience, Gnome and Plasma consume a lot of resources and throw more errors. But hey, anything runs on top of Arch, and mutiple DE’s easily, too!
Of course, I only ever went with much older hardware, so no btrfs-experience on my side yet.
Some help is here, besides the Wiki:
Cheers, and…
YMMV.