The Torah was edited with great precision. This is the idea behind the notion that "there is no chronological order to the Torah". Items are placed were they can teach the greatest messages—form can be as important as substance.
Like many a great leader, Moshe—the greatest of all leaders—had difficulty delegating authority. Knowing you can do the job better than others, it is not easy to watch as subordinates are not quite up to the level of their superiors.