These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
While there could still be a twist coming (and knowing Sanderson, there probably is), this is still an alternate America where the natives are Eldritch Abominations, who European settlers have contained in a reservation named for a state that in our universe, gets its name from the Otoe people.
The Untwist: The reveal that the arrogant, cruel, powerful, and thoroughly suspicious Professor Nalizar is in fact evil. Most Genre Savvy readers will immediately dismiss him as an obvious Red Herring (especially readers familiar with Professor Snape).