Sigh, this has been brought up before on IRC and in support. The answer we can provide is simply this, which has been in the FAQ for weeks now:
Q2: Will the server merge affect the release of new game updates?
No. The merge is a totally independent project being worked on by Gameforge. In the meantime Runewaker keeps working on the game itself and update should continue as they are now.
In other words, the merge is being worked on almost entirely by Gameforge, with Runewaker likely providing consultation guidance whenever needed. Meanwhile, as it says, Runewaker will continue to work on content updates just as they always have and will do and those will be pushed to the servers as scheduled.
As of this moment, we do not have any ETA on the rest of the server merges. As I've mentioned in a separate thread, testing is still going on as the merges are going to be astronomically larger and more complicated in comparison to the AU -> Artemis merge. Sorry, but as much as you'd like it to be "flip a switch and its done", it's likely not that way when it comes to the amount of data to move over (trust me when I say, there's a LOT of data to sift through and move over).
If you have any additional questions regarding what has been mentioned, I direct you to the FAQ that has been posted:
Future server merge plans
As this is the only information we have as of right now.
EDIT: the EU servers are not getting merged for probably some time. As Gameforge wants the content on the servers to all be the same, would we rather have the EU region stagnant for updates while we wait for server merges in the US? Probably not. Same concept as the siege war servers not working correctly on EU for months. We didn't hold back the siege war updates on the US servers because we were waiting for the siege war servers on the EU region to be stable, did we?