I feel that Sanderson simply having any sort of short novel within THIS world just feels off. The weight it wants to impart makes no sense, like a cup of water thrown into a sea. Within the main books, we have miles and miles, literally thousands of pages, to live in and to see the characters play in the sandbox. Just remove the preemptive, set-up cameos in the main books entirely, and it could make for more robust side novels?