The Atrox in Omni-Pol are specially trained and they do not dabble in politics. I understand that the concept of speaking in a political way and getting a point accross to others or even influencing the events on Rubi-Ka is beyond a normal Atrox' abilities. Big and bulky, with the brain of a dog. Atrox do not breed if you forget that. They are being generated and so far no modifications to their DNA profile have been made, as far as I am aware. Atrox are still what they were when they were made for the mines. They might have been found useful for other purposes aswell - law enforcement being one of the fields where Atrox' can prove how strong they are, but politics is not one of these areas where they have any skill in.
Solitus have evolved in thousands of years and are now genetically perfect humans, fit to be used in any possible field of work. Atrox' were never meant to be used for anything other than mining notum. They cannot breed, so evolution is out of the equation and Atrox' never had and never will have the brains to be successful in politics, which is a good thing. It is a frightening thought, considering how Rubi-Ka would do were Omni-Tek or the Clans lead by an Atrox...