I read through the hint and tricks page and some forum threads, used winetricks accordingly, set the dll overrides correctly and I was able to start the launcher, log-in and then I get to the main launcher screen that shows news, server status, etc. but it doesn't update the game. Instead of the green play button there is just simply nothing there to click on. Looks like this: https://a.pomf.se/kcnwit.png
This is on Arch/Manjaro x64, with newest Crossover, and I'm actually using the Steam version of FFXIV, so I installed this via Steam. But it probably downloads only an outdated version. I don't have a Windows license or anything so I can't get the files from anywhere.