Any idea if the Draconians were meant to be Earth-descended humans who settled the stars, or if they were strictly meant to be Human Aliens™? I picked up the impression it was the former, but I doubt the show ever said so.
Season one was very, very unclear about whether its various humanoid aliens were human colonies or not. Some of them seemed to be, others not so much. I don't think the Draconians were meant to be human descendants, though. They conveyed the impression of a mighty and distant power that had thrived for a long time. In the pilot, Draconia was a prominent galactic power that the impoverished Earth was trying to form a defense and trade pact with, so they were much stronger than Earth. Later episodes established that they had a much further reach in the galaxy than Earth did, even after Earth was retconned into a major interstellar power.