It works because the Architect isn't just any old Darkspawn: He's one of the seven Magisters who entered the Golden city. You'll notice Corypheus doesn't taint anything he touches either.
Yeah, if the corruption affected everything with even the slightest exposure, the Inquisitor would have never survived being lifted up by Corypheus during the attack on Haven. Nor would it be possible for anyone to travel through the Deep Roads without immediately dying.
It probably requires either getting some of their blood in your system or prolonged skin contact with darkspawn or an already tainted object.
Nope , DG said that if architect showed up he wouldn't reuturn if killed sadly site with interview doesn't seem working anymore , so all its left is some post that were linking to that interview.Some people may recall as it is the same interview DG said Architect is same type of character that Corypheus pretty much pointing that Architect was tevinter magister as well.
Except that other devs have also said that the Architect was supposed to appear in Inquisition during HLTA before it was changed, suggesting that his ultimate fate is still in play at least among the writers. While Gaider's word does have some clout, remember that Weekes can easily Joss this as the new head writer.
The Architect having the same ability as Corypheus and the Archdemons to soul surf into another tainted host would be one means to have him survive Awakening if you killed him. Since his death can take place in a giant darkspawn lair (and baby factory), as well as alongside several Wardens, it's not like there was a shortage of tainted individuals running around for him to hop into.
If Utha survived the fight as well, she would probably be the best bet for how to handwave his death, since as a ghoulified Warden, she has the strongest corruption of anyone in proximity at the time of the Architect's death.
If the Archect doesn't have the same ability as Corpyheus, one explanation could be that whatever transformed them struck one of them first and then radiated out to the others (an event which is depicted on one of the murals at Skyhold). As their leader, Corypheus being the first one affected and it passing through him and into the others, might be why he'd have some unique abilities.
But I personally don't see how the Architect wouldn't have that ability, since as one of the Seven, he was right there with Corypheus when they were all transformed and they are both the same type of unique darkspawn, so wouldn't they have the exact same abilities as each other?