wolfsite: No chance. The Linux Ports were done by Feral Interactive and they are very Pro DRM .
I have played the Linux version of Tomb Raider 2013 and honestly the performance is worse when compared to running the Windows version under WINE or Proton. I did a search and this seems to be an across the board issue with Linux ports from Feral.
On top of that it seems the Linux version of TR2013 was pulled by Feral a few years ago.
https://www.gamingonlinux.com/2022/02/tomb-raiders-linux-port-from-feral-interactive-delisted-on-steam/
So they don't seem to care about it.
Only the first port (Tomb Raider 2013) had performance issues wich can be fixed with a few tricks, nothing that you can´t do or GOG can´t fix.
Don´t believe me? Try it, just use "mesa_glthread=true %command%" if you have an AMD graphics card, or "__GL_SHADER_DISK_CACHE_SIZE=4000000000 __GL_THREADED_OPTIMIZATIONS=1 %command%" if you are using an Nvidia GPU, those commands will help a lot.
Now, if we talk about the ports of Rise and Shadow, those are pretty good, and don´t have the level of stuttering and perfomance issues that the first port had, and you can enhance the performance also with commands, again, nothing that GOG can´t fix to get the best experience.
Finally, the Linux port of Tomb Raider 2013 was pulled by Feral because the licence of the port expired, Feral knowing that Proton was slowly becoming the best way to play games on Linux, and looking that the Windows version ran better than the native one (because of the way that the port was made), they for some reason decided that the best choise was to not renew that license since it wasn´t even worth it to try to make the port better because of Proton, if that was a good or a bad choise, there's no way to know, but what i do know is that those ports are part of the history of PC gaming, and the problems that they had can be fixed or at least mitigated with patches that GOG can perfeclty implement, so there's no excuse.