Honestly that was sort of my experience. Our catechists were well intentioned, but we had zero standard curriculum, they spoke on whatever part of Catholicism was important to them. When I was asked to teach we did it that way the first year, and then I got to thinking of ways to make the program better. I found an imprimatured program, ordered and paid for the materials myself, spent an entire summer viewing the presentations, and going through the printed materials, and then made a well-reasoned proposal to the board of education of the parish. It was welcomed with enthusiasm. We now use it in both the English and Spanish RCIA. It is as in-depth as it can be for the time limitations given, and it sticks to Church teaching, without the personal biases of the catechists.