Marilyn might take a bit more time because she has more outfits for her, and also she's my favorite one to draw. She's the last one I need to do before fully completing the task of updating the Class of 2422 line-up.
Going back on a point, I think that's probably why the reason it's taking more time than usual to revise this line-up: everyone here has more than one outfit. Unlike Propinquity where everyone has one outfit and one pose each, the Class of 2422 characters all have at least two outfits each, and I wanted to draw a different pose with each different look.
Of course, I could just draw one pose for each and just swap out their outfit instead, but where's the fun in that?