"...students experience the same high levels of rigor and learning outcomes regardless of teacher or school." Not sure how realistic this is. Different personalities and learning styles will change classroom dynamics. Learning is not a one size fits all thing.
"Universal Design for Learning" - This is not possible in my opinion. Different learning styles and disabilities make this impossible. Also sometimes learning is negative. History is negative and must be learned. Devaluing the negatives of the past or only focusing on the negatives is not good.