For those that had Leliana killed off in DAO, did she explain that the Ashes somehow revived her? Or is that headcanon from the community?
She acknowledged it,explaining that she was dead, but the maker ressurected her. She considers it a wonder. It ties very neatly into her story. Given the wonderous nature of the place, it's not entire unplausible.
Also, I ressurect my characters all the time, after they've been completely scorched by dragon fire. It takes 6 seconds and a health oot to get them fighting at full strength again.
Btw, what's Corys excuse?
I think Leiliana has the strongest case for being in the story, along with Cassandra. Her role as left hand was already established before DAI and is crucial for the plot.
Sure, you can change the story so it does not require her, but that is true for every charcter. Why does Cullen need to be there?
Oh, and please stop with the writer's pet argument if you have nothing else to say. It just makes you look stupid.