According to comments the latest patch make the game crash, probably will release the latest patch with a fix later, it's not convinient to release a patch in other stores if you know is broken. On the archivements side of things, I think that goes on another list. Have you tried to contact one of the developers? Probably they can add it when they release another patch. In my case (probably the same goes to other users), archivements are not a big deal, many users don't use the launcher, but always is good to have them. Try with discord to see if a developer can do something.
I know about the CYAN GAMES official Discord server, and the Firmament channels on it.
Before the firmament-bugs-n-tech-issues channel was started, Cyan was telling users on Discord, and in the Kickstarter Update #57 - LAUNCH DAY!
, to email support at Cyan, about bugs found.
The point I was getting at, was not merely that Steam is getting the latest patches first.
It was that both game content and game patches are on Steam, but not on GOG, and that is has been that way since the start of game development.
That is quite definitely a case of GOG gamers being treated as second class, if not worse, by Cyan.
edit: try to fix URL formatting
I understand your point, I'm just saying that I understand the devs too, updates cost money and time, from both the developer and from GOG, if the patch you released is broken I don't see no point in release something with a problem just for the sake of being on par with Steam, the same happen with another game I don't remember the name, the latest patch and official for now broke the game, the Steam player can't play their game, GOG never recive it, with is something bad from one perspective and really good from other, I prefer a game that is playable.
Cyan update their games, probably they will release the next patch at the same time if it's good.