Patty is amazing. She does have a new role in the epilogue of TUP but you are right, she didn't feature much at all (only 6 small references in TUP) for someone that was quite pivotal in TPP and seems like rebellion material or a kindred spirit to Maxine

Gene mentioned something about this in the first AMA. He said there is a limit on characters to feature in a story. It gets too hard to track or something.