I tried to send this via the Feedback form, but nothing happened after pressing "Send email".
I am pretty sure you have already heard news of Valve's Steam Play, which uses modified WINE to play Windows games on Linux. I've tried it personally with pretty good success.
More information in links below:
The third link mentions limit of file descriptors. This I believe defaults to 4096 on Manjaro. I first encountered this limit when I attempted to build "code" AUR-package. I had to increase the limit in order to successfully build the package.
The esync-link further reinforces the fact that the default Linux limit of 4096 is way too small. As such, I would like to propose to change the default limit so that people wouldn't have to do it manually.
Seeing as many (all?) Manjaro spins already bundle Steam by default, I believe this would be in the best interest of Manjaro.