Request for World Split

I hope I'm requesting properly. I need the world split feature, my server which has been running on the same map for 2 years depends on it. A few players wanted creative mode so I gave them a way to use it away from the hardcore survival players. But some of those creative players have survival friends, that's why a multiworld feature is not an option for me. Not only that, but I have spent a lot of time on a very extensive railway system between the two sides. My server will cease to exist without a world split, and many grownups will cry, I guarantee it.  lol

since not many people use the world split feature, maybe you could make it a separate plugin which is compatible to antishare, that way only those who want it will possess the baggage.