RotMG Unity Client/Server Speculation

Do you guys think that Deca is going to rewrite the server side of RotMG to fit with the new Unity client. Or do you think they are just writing on top of the current networking protocol? From what i've seen in the videos, so far it looks like its just slapped on top of the old networking protocol.

They have said in the past that they intend to run both Unity and Flash side by side, so presumably the server would be the same. At the same time, maintaining a live, not to mention old, game isn't easy and I can't believe they would pass up such a good opportunity to start from scratch or at least do a major overhaul of the server. Also, the most recent Unity update from Deca didn't seem to showcase any substantial changes to the client, so they must have been either working on new server stuff or jacking each other off, honestly a toss-up.