Thought about putting it on github /gitlab?

I'm not opposed to it, but is there demand for it to be on GitHub?

It would be interesting to hear your thoughts on non flatpak for steam and flatpak for heroic.

Steam's Flatpak version has some issues, the way it's sandboxed causes things to not work as it should. I've seen people complain about controllers not being detected via Steam Input, confusion around permissions, minor bugs among other things. There's really no reason to use that instead of your package manager.

On the other hand, Heroic actually recommends the Flatpak by default since it's stable, has no issues, isn't distro-dependent, etc. There's no reason not to use it instead of your package manager.