The WildStar site has been updated with a new "interview" with one of the Mechari. In it, some of the lore behind the mechanized race is revealed, as well as the basic personality type they represent.
Q: From what I've heard about the Dominion, I'd say you guys have done a pretty good job.
A: The Dominion has ruled the galaxy for more than 1600 years, and has conquered numerous worlds while doing so. Designating that achievement as "pretty good" is both grossly inaccurate and acutely insulting. For your own well-being, please refrain from doing that again.
Q: You got it. Given the fact that you're a "mechanical being," I'm assuming you don't have to eat?
A: Incorrect. Again. Like any complex lifeform, we require an energy source for continued function. Consuming food is also a useful tool for manipulation. Seeing Mechari eat gives organics the comforting idea that we are, in some way, like them. A most exploitable illusion.
Read more on the WildStar site.