Bethesda released a new content update for The Elder Scrolls Online today, which substantially changes the game. The One Tamriel update removes Alliance restrictions, and also introduces game-wide scaling of content.
From the press release:
One Tamriel, a free update for all players, delivers the freedom gamers expect from all great Elder Scrolls games – more self-determination and playing options for veteran players and new players alike. With a truly open world and a level-scaled environment, adventurers can go anywhere, with anyone, at any time from the moment they exit the tutorial.
The One Tamriel overhaul is available as a free update for PC players. Xbox One and PlayStation 4 users will get access to it on October 18.