It was interesting to read how the 40 weeks measure came about, however the difficulty of varying cycle lenghts in Naegele's Rule still exists with Mittendorf's Measure.

The 'easy' way of calculating EDD using Mittendorf's adds extra error because it does not take into account the varying number of days in a month.

ACOG itself (American College of Obstetricians and Gynecologists) does not recommend interfering with a normal pregnancy before 42 completed weeks.
This was the most relevant part of the article. Replacing one calculation with another doesn't really help. Educated mothers and health care professionals that are willing to listen to mothers and the recommendations of the governing boards (when pregnancies are healthy) is the best way of avoiding unnecessary early intervention.