I'm posting this here because it seems the most appropriate place, and I'm seriously wondering who else considered this possibility.
When Corypheus first reveals what he intended for the Anchor one of my first thoughts was: what happens if the only way to stop him is to beat him there? Morrigan makes a comment in a similar vein at Skyhold about being worried that Corypheus CAN become a god.
So, I wonder, would your Inquisitor have gone to the Black City in an attempt to stop Corypheus even knowing what happened last time someone entered there.
Honestly, I thought that is what would happen at the end of the game and was kinda disappointed that it didn't, having the final battle take place in the Fade, as the Inquisitor attempts to stop him from reaching the Black City, really wrote itself when you think about it?
Imagine if that we lost our companions for the final section of the fight, leaving them behind or sending them back out of the Fade to confront Corpypheus on our own. Until it's only Corypheus and the Inquisitor standing before the outside the huge doors of the Black City and duking it out once and for all, so you really got a scale of how big the stakes were?
Then after standing over the broken body of Corypheus, the Inquisitor looked at the huge doors, reached out curously as if to touch them, before pulling sharply back, shaking their head and turning around and walking away?
For such an epic game, we needed an ending that matched it.