In my company we have monthly maintenance patches on our AIX servers. Prior to the patches going into affect a document is released explaining each change within the patch including what the issue was, what is changing, what to expect to see differently, and any info the end users may need to know. It's called Change Management and with RoM, that process is obviously broken.
This is not even remotely the same situation and therefore cannot be used as a valid comparison. Patching entire server operating systems is obviously going to have its changes released ahead of time because 1) The developer has entire clusters of servers to test things on, therefore they can come up with every situation imaginable before a patch is even thought of and 2) Releasing a change that's broken/missing/bugged/exploitable is not only detrimental to your customers from an unprepared standpoint, it also leaves you vulnerable to lawsuits because your company knowingly released something that affected security of the system. In banks, trading systems or other financial systems this is especially important.
This is a video game. For valid comparison you would look at other MMO's (ESO never releases their COMPLETE patch notes ahead of time, nor does WoW, EVE, FFXIV, or any of the other really big ones). You could also look at some small development projects and notice they never release patch notes or version change information ahead of time except maybe an hour or two once they're certain the changes have taken effect correctly and everything is bug free.
Again, small projects and video games never publish changes ahead of time unless they have open bug testing/beta opt-in programs (Minecraft is a good example of this). Otherwise, you're just barking up the wrong tree when you complain about stuff like this. I don't ever see it changing because then Gameforge would dig an even bigger hole with its customers "loyalty" when a patch is announced and then it doesn't happen so no need to discuss further.