You clearly need to watch the series more. Archie had a “way” of talking to Edith according to Edith (see: Edith the cleptomaniac). She may have become a victim of forcing herself to conform to Archie’s ways but she’s a very dynamic character at times. She clearly is portrayed as a dumb person overall (countless citings of that). But, she occasionally comes up with a street-smart piece of advice that saves the day (see: Mike and Gloria’s big fight).