jj has tattoos and hakev does not - (that stuff on the side of his head appears to be a borg implant, which im kind of annoyed they did not flesh out his back story)
Yeah, I agree Hakeev wasnt as fleshed out as Obseik. That said the last dialogue from Hakeev was better than his previous ones. He even makes a comment about the Borg in reference to the Iconians. "As the Borg would say, "Resistane is ... futile." " That was a profound statement coming from a liberated Borg as Hakeev seems to be. It could also explain so much of his motivation.
Having been assimulated by the Borg, Hakeev probably doesnt want to become a slave to the Iconians. I am sure he values his freedom above all else. Hence his willingness to help the Iconians and make a place of power for himself. As Krestel said, "Better to rule in hell than serve in heaven". In the end, Hakeev's character did become less one-dimensional.