I wish there was something separate for baptized candidates, too, but I have no idea how we would implement something like that.
We already have enough trouble booking rooms for the various periods of RCIA (during Lent, there are three going on at the same time), and getting enough volunteers to lead these.
Having a separate class for baptized candidates would mean that yet another room is needed, and at least two more volunteers - and we still need rooms and volunteers for the programs we run for the Catholic population, as well - Legion of Mary, Knights of Columbus, Catholic Women’s League, the Bible Study groups, children’s Sacramental Prep programs (First Confession, First Holy Communion, and Confirmation), marriage preparation, baptismal preparation, Catechism classes for children and teens, the youth group, the Squires, the Challenge Girls, and so on.
There are only so many evenings in the week, and only so many rooms available - and we already have a shortage of volunteer lay leadership.