It's not so much dictating when just stating common sense. If they're trying to capture new players, especially for a game that has already failed once before, there needs to be a ton of info, screenshots and videos to capture that audience. If this was a new game "when they're ready to" works, but this is a relaunch, we should be overwhelmed with information about it, especially since ARR is a relaunch of an MMO that already exists and currently running, there should at least be the basics up and no one can deny this.

Obviously Crystal Tower details wouldn't be listed, by why not the battle system? Why not the craft/gatherng systems? Why not any systems information? You could argue "unfinished", but even throwaway korean MMOs lists out and show off details before release of even a beta.