Humans are and have been the main focus on GW lore.Entire GW1 was focused on Humans, with other races just being 'side characters'.It's only natural that with so much human lore to see more human story than other races.Cantha is a whole human continent, so is Elona.They can add some diversity with Tengu and maybe some new races to Cantha, but yes, it's always going to be mainly focused on Humans. There's a possibility other races might receive spotlight when we don't touch places that are heavily built around human lore. And i would prefer them to have as little to do with Human as possible, even after PoF i still don't see the difference between Elonian and Krytan beside one is in the desert and other green field, maybe there are but then again......i don't care enough to pay attentionAt least with Charr we have 3 Legions and a TribeAnet hadn't done any justice for Asura/Sylvari/Norn: Sylvari story was lack luster in HoT(There even a friendly Nightmare court that appear out of nowhere during Mordramoth!) they re-use the Inquest when bad scientific things happen.