I play a 100% BiS 19 Warrior (thats right) on Era.
As of the end of the summer, no more WSG pops. We had a good summer of 1 or 2 games per night with the hype of unofficial HC.
Pvp at 19 now is wpvp in either Stonetalon (Alliance), Redridge (Horde), or Hillsbrad (both) on the Whitemane cluster. There are TONS of levelers currently.
In 1 hour, I gained 34 hks in Stonetalon killing Hordes ranging from lvl 20 to 27 on my level 19 Alliance Warrior.
I've run into a few other Alliance twinks too on my nightly slaughters there!
https://discord.com/invite/h5VArQGZrF