I think I will give it a week to see. Here is my hunch, and I hope this happens:
Most people will continue to play in X_Server, where everyone else is. However, when regiment members want to train together, or someone wants to private duels, or when X_Server goes down as it sometimes does, people can use the NA Server as an alternative.
If it does wind up splitting the playerbase, it can be taken down. But, I think we should wait and see. It's always good to have a backup, and having two servers might attract more players, as it shows that we have room to grow.