eos is as close to vanilla arch as you can get while still being plug-and-play, basically. they have a remote for all their own stuff and if you remove that from pacman, you're running normal arch. the main thing that's different is they ship with common-sense configs and a graphical installer. no manjaro-like "kernel update service".

it's honestly perfectly stable. if you're worried about things breaking when the kernel updates, run a LTS kernel.