Zhoi (Leanon)
The old data seems to be incompatible, doesn't it?
Some players might not get their old characters back "as they were" because their char-name will have to be changed, and whatever else will have to change...
No it is complete. Otherwise you couldn't play at this time.
The server are currently up and running. Freeze the data at this moment, set up the new server, migrate the characters, take the old servers offline and make the new one public. That is a real migration strategy. The current strategy is delete the old servers, start a new one.