RE: "Blume...she liked controversy in just about everything she wrote and most of it was written badly. It was social propaganda for pre-teens if you ask me."
"Social propoganda"? Does it make you feel good to drag your (misplaced and wrongheaded) politics into the discussion of a great children's writer? Blume's only "agenda" was to speak to children, and later, pre-teens 1) On their own level 2) about subjects that interest them 3) about challenges they face (especially young women here) and 4) without talking down to them or shoving a bunch of "life lessons" down their throats.
Blume was funny when she needed to be (Tales from a Fourth Grade Nothing is outstanding) and serious when the subject at hand was serious (as the older brother of a sister who is on the verge of puberty, I thank God my local library has a copy of "Are You There God? It's Me, Margaret" to help me out of some tough conversational jams).
What's your major malfunction?
I hated every Judy Blume book I ever read. I don't even remember the titles other than "Iggy's House" and I really hated that one living where I do.
L'Engle, OTOH, wrote pure fantasy - and more morally. Her writing is much more lyrical and does meet pre-teens at their level.