TTN is currently in development mode. People are working very hard to get to version 1.0. As you probably know development takes time, development for new technologies takes a bit more time. TTN is doing its development out in the open (sources are on github), as a result we're all experiencing some of the transition issues while moving from the demo platform to the first version of the new platform.
You (and others) are very welcome to help. The sources of the new wiki are also on github and I know from experience pull requests for updates to it are welcomed.