I just think it was a wasted opportunity. The Architect seemed to feel guilt over what he and the magisters did creating the Darkspawn. I mean, if you believe what The Architect was telling the Warden. Corypheus' and the The Architect's goals are polar opposites of each other, and it would have been interesting if you had been able to see either The Architect give you influence in DAI or a dead Architect giving you well, not even a mention.
And the fun of watching your advisors react to being sent to negotiate with The Architect.
It seems so simple to implement I'm just surprised they didn't throw in a quick fix like that. There were so many plot threads tied up with Side Missions in Inquisition that this could have been an easy fix. I hope we'll see his legacy again in the future.