The good news is that it’s a nice thing to add to your daily tasks; there are three levels of challenge you’ll be facing, along with a mechanism to occasionally reroll one of your endeavor challenges in the hopes of getting one that’s easier to fulfill. Successfully clearing them will earn you points of Personal Endeavor experience, which can lead to account-wide stat boosts.
Players have also uncovered a new spoilery map of the various galactic quadrants hinting out the expansion destinations, so it’s hardly like this cached page is the only thing being found a bit early.
Source: Reddit, Cached page; thanks to Jake for the tip!