Today I received from feedback from my professor about my proposed project. Professor Kramer also supports the idea of research into lexiles. Having worked in school media centers and with curriculum development for many years, she is certain of her own opinion on the matter. Via our course tools, she told me, "I personally DO feel that this is an argument to research, perfect and have with the principal. There is NOTHING good about restricting kids to books at their level exclusively and they are ultimately harming readers."
I am encouraged by this feedback, as it fits with my own feelings and with what I am finding. Proceeding onwards....!