It's great to see you here again!
My church was growing so fast for awhile and then a couple years ago we still got lots of new members, but we lost enough old members that we didn't really grow at all. Now we are still just kind of maintaining in terms of membership I believe. I don't know if this is because things just go in cycles or we got complacent or if we are just experiencing a different type of growth now. That's a shame that your church seems to be losing families. I am totally with you about a big part of going to church being for my daughter. Luckily my church does have a really strong and vibrant RE program right now.
I don't know if it is "70s" or not, but my church did something similar a couple years ago to define our vision of what we wanted to be. One thing that either came out of that or came about shortly after was we divided our RE staff so we have a Director of Religious Education for Children and Youth and a separate person in charge of adult RE. We had grown enough so we were large enough to support this. I think this was helpful for us because our church had kind of "contingents" - the "old guard" who have been members of the church for years and years and are very tied to a humanist and intellectual discussion and grown-up view of a spiritual community, and the faster growing family contingent. A much larger proportion of our new members have been families with young children. With the separation of RE responsibilities both groups feel like they are represented.
Our DRE for children works really hard and she is incredibly dedicated. Just last month I received a letter that we now have more than 160 children and youth registered for RE! We are now going to try to hire an RE assistant to support the increased size of our RE program.
Regarding Sunday school, we have our staples that we return to time and again: OWL for the young teens and pre-teens, Free to Believe for first and second graders, Neighboring Faiths for 5th and 6th graders. We also try a couple new things each year. And we have our new Coming of Age program which we did for the first time last year. We have an RE council that works with the DRE to make decisions about curriculum. We have done several Tapestries of Faith courses, but frankly, I am not very impressed with this curriculum. My daughter prefers some of the multi-age classes she has taken such as You the Creator last year and SUUper Plays this year. Honestly, I am not that involved with the RE side of things at my church, as important as it is to me. I contribute in other ways better suited to my skills and personality. I am just endlessly grateful that there are such talented and dedicated people at my church who are skilled in that area and that my daughter can reap the benefits.