The net result is also that you can see the not-quite-final patch notes well before the patch goes live. Fractured Memories allows you a different way to advance your characters across your entire account by remixing and pulling in all of the game’s available content; success nets you points for the new account-wide Ability system along with the usual gear. There’s also new Xanadu side quests and party trading, so you’ll have plenty to do with the patch whether you jump in to test or wait for the full release.
Source: Official Site, Patch Notes