The crux of this is that whether you are okay with the "tragedy" or not, they straight up didn't finish developing her questline. There's no questioning that. They can absolutely stick to their guns and keep it tragic, but they need to finish the questline, allow us to explore those options that were OBVIOUSLY meant to be explored for her missing Act 3 quest, and earn that tragedy. As-is the tragedy is exactly what people have said throughout the thread: that you're not allowed to even try.
It still wouldn't feel great because True Resurrection is in the game but as is the current theme of the state of Karlach we're not allowed to try with it, but at least if the questline lets us TRY and still fail it would be a lot more meaningful. They weren't writing themselves into a corner but due to her late addition and moving the game up a full month they CREATED a corner for her writing to be stuck in.
Well said! Most of us here would reluctantly accept a fleshed-out questline that lets us earn her fate, rather than watch on the sidelines as we do now.
They could do just that in a potential definitive edition, just like they did before. But until they remove the enriched infernal iron from the game, there's still hope for a different path.