Humans: There's something of an El'jaziran movement in the game at present, with more and more Human characters casting themselves from a Mhojavian background. The RP is potentially badass but El'jazira is pretty stuck in a niche in which they're subservient to Bloodloch. Personally I'd like to see more desert-dwelling Humans in other areas, like say outposts or nomadic camps for those Humans who chafed under Lochian rule.
Djeirani: I think they should be a playable race! They have some seriously in-depth lore and culture. A deep caste system; social status and noteability based on skin and hair color; the quasi-Italian royalty motif. Plus we could stop making fun of people who try to RP as them.