I don't know about anyone else, but I'm a little bit saddened that all the pvp and endgame content is in one zone.
What other parts of Tamriel would you like to see turned into Battleground Zones?

For me, I'd love to see any part of Vvardenfell or Solstheim (Although it is in the center of the ebonheart territory, think about it: the ebony mines, yet it's separated from the mainland, and it borders the rest of the continent), a part of the eastern or southern Elswyr (like Senchal, on the tip), and Stros M'kai--that island between Hammerfell and the Summerset Isles.