The developers of Vaporum, the Dungeon Crawler in a Steampunk-setting, have released a Linux-only patch, which fixes the problems with controllers:
Patch #13 (02-10-2018) (Linux Only)
Just a small patch for Linux only this time.
sc-controller, the Linux-User-Mode-driver for the Steam- and other controllers (e.g. DS4), has been released in version 0.4.5 today.
The main-developer Kozec said on Patreon, that he disagrees with the direction of the Linux-Kernel-developer-community, and that he is not going to release more versions of sc-controller for a while: