So glad you're back and getting better! And don't worry about the writer's block - most of us are just happy you're alive, so we'll be thrilled with whatever you can manage.
"Let her work with other people; that will build up the secondary characters more and save your heroine from leaping to “intuitive” conclusions about things she can’t actually know and becoming an Author’s Darling."
I recently started focusing on this with two different stories, as part of a more general "flesh our your minor characters, goddammit" kick. Both involve scientific/scholastic collaboration, and it's surprising how fun that is to write. It really forces some serious worldbuilding, too. In any case, if a character asks a lot of questions and consults with other people, they seem much smarter than the Author's Darling who pulls the "intuitive" crap left and right.
Sometimes I think people are worried about including too much conversation in a novel. (A common complaint is that a book is too talky, though what it should have instead- action, or description, or romance, or what- is rarely mentioned). It's a shame, because interesting conversation is one of the roots of greatness, for me.