Umm, how are the members of the RNC determined?
Let's say Texas is not happy with the current RNC performance, nor the way the guidelines for conducting primaries are issued ~ and they want something different.
Texas would do what they usually do but send delegates/committeemen to the NEW body and cut off the OLD body.
You get enough state party organizations doing that you can disestablish the current RNC and end up with what is for all intents and purposes a new national party operated by Conservatives.
Without state party support the GOP-e left in orbit about the old RNC would be little more than a small third-party without boots on the ground. Might be bigger than the Libertarians, but probably not.