I don't understand. Why did you do this? What purpose does it serve? What significant improvements does WikiCreole have over MediaWiki syntax?
In the field of spoken languages, people have tried creating a language to make communication between people using different languages easier (Esperanto being the best known). None of them have taken off, because it involves everyone learning a new language, and there is no point everyone doing that. When people who speak different languages wish to communicate, they speak English, since it is the most used language. English is not as easy to learn as Esperanto, but people have a much greater incentive to do so since there are actually people that speak it.
Wiki syntaxes are no different. Creating a new one seems completely pointless, if people want to make communication easier, they can implement a parser for MediaWiki syntax in their engine (God help them if they try, but from what I can see, WikiCreole isn't designed to be any easier to implement).