If you could make one change to the Cosmere that is impossible to change now, what would it be?
Hmmmm…. I gave this some thought all week, and had trouble deciding because the the things I would change are more about individual books, and less about the Cosmere as a whole. I don’t know if I’d change anything about the big story–mostly because the things I would want to change would all take place in the Dragonsteel era, and that book isn’t canonical anyway. Once I write it for real, I can change any of the things that I don’t think are working.
As for the core of the Cosmere…I might make some small tweaks to Allomancy. I have never liked how the signal of sixteen worked in Hero of Ages. (For those not in the know, I talk about this in the annotations–I was looking for a sign that Preservation could send that Ruin wouldn’t notice, along with help for mankind.) In the end, I think this ended up being a little clunky. Other things (like slatrification in Sand Mastery) are small enough I can change moving forward, but not Allomancy. So I might take another stab at that.
On the whole, though, I’m very pleased with how the larger Cosmere story is playing out.