I agree that academic rigor is associated with more, not less, homework, to reinforce critical thinking. However, having put had two kids go through elementary and middle school in different MCPS school clusters, I have to point out that the homework is usually quite dumb.
It would be better if homework was more intelligent, and a little more targeted to students' levels. I gave one of my kids a pass in elementary for homework, because it was all way below her level, and thus did not serve its purpose. For my other kid with learning disabilities, the homework suited perfectly, and I sat down with him to make sure he did it