Haven't seen anyone talking about it, so I went ahead and took a few screenshots and thought I'd make a short write-up for anyone not on the Alpha.
Whereas before the initial quest was offered by a Mysterious Raven and pointed you to Havi, a previously unknown Vrykul at the Legerdemain Lounge, who then further directed you to join up with a group of Vrykul heroes on the Broken Shore, today's Alpha build introduced something new.
That initial quest is now offered by a faction dependent character: Eitirgg for the Horde or Sergeant Dalton for the Alliance, who directs you to speak with either Overlord Saurfang or Danath Trollbane, located at Krasus Landing. The relevant faction champion gives you a story about fighting on the Broken Shore before heading out with the player in tow.
Unfortunately, this is where the divergence ends. The Broken Shore scenario is still inhabited by Vrykul, while Trollbane and Saurfang are nowhere to be found, and the events seem to be unchanged. Obviously this is a work in progress, and I'm sure we'll see further updates, but I think it's a very interesting change that helps draw more connection between the inevitable Vrykul/Halls of Valor and the player faction. At the very least, heading off to the Broken Shore in the company of Saurfang/Trollbane is much more plausible than running off to die because a random Vrykul told you so.
Screenshots
Alliance