Awakening: The architect only remembers being the way he has always been, a talking darkspawn with different powers. He used his knowledge to manipulate the taint in other darkspawn to create the "mother" and the other awakened darkspawn. In awakening, all of the architect's followers called him the architect, but it was the mother's followers who called him the father. He created all the awakened darkspawn. His name could mean he was the "architect" behind the awakening of other darkspawn, but there was just too much to his story for me to believe that. As for him possibly jumping bodies, this is the way bioware will possibly bring him back. He could normally survive, or be killed in awakening, if killed this is the way they will bring him back.
Theory: Ive always thought the architect was one of the 7 magisters, it just made so much sense back during awakening. As for corypheus searching for the other magisters, i doubt he looked very hard, or even in the deep roads at all. If we go by the timeline, hawke released corypheus in his first year of kirkwall.... This would mean corypheus would have 9 years to search for the other magisters... Ok, thats all well and good... but if he had 9 years to run around and do things, why were the orlesian wardens only under his command, instead why wouldnt he have gotten all of them, especially those in weisshaupt? This is what makes me wonder of how hard he actually searched. As for the architect, yeah i killed him, but he probably jumped bodies as a plot dodge, but im ok with that. It just makes sense, it just does.
So, we have 3 major villain/sort of villain factions going on here in the dragon age games.... we have the old gods/arch demons faction with only 2 left, besides urthemial's soul.... flemeth/elven gods faction (this is the sort of villain category, cause we have no clue).... and finally the ancient magister's faction.... I would love to see a future game where the archdemon/blight faction and ancient magister faction are the main villains at the same time... maybe another magister rises, or corypheus survives, or maybe the rest of the magisters team up and we are forced to fight 2 separate wars, the blight and the fight against the magisters.... What would be worse than a blight with the original magisters at its head... and maybe the architect teams up with the protagonist to help stop them, or at least kind of helps... or just screws things up... idk