It was pointed out by a user on IRC that currently there hasn’t been any results from the research into the fractal of the mists. As such it’d be nice to see some results in the form of the extended lore around the fractals e.g. the events leading up to and immediately after the fractal.
This would be done via a book, similar to the Storybooks in Guild Wars 1. By completing a fractal the respective page in the book is filled with lore about the event. For added bonus points (to ANet) this could also be done so that completing the fractal once would give information about what the player experienced, twice would give the events leading up to the event and three times would give the events afterwards.