What would ruin this lesson is to teach ONE ideal family and make everyone feel that if their families DON’T fit the mold, then they are doomed in the eternities. That’s not uplifting, nor is it helpful.
And yes, after reading through the lesson–I know what you’re thinking! It’s the same thing I thought as I read this. This lesson has been taught often and usually in the same way. The ideal family is presented, the ways of securing that ideal family in heaven are talked about, quotes are read, and the reminder that your ideal family cannot be together forever unless temple covenants are lived up to wrap up the lesson in a neat little bow. The one thing that is often not talked about is the fact that hardly anyone has an ideal LDS family. We are all so unique, with various family situations that it is imperative to be very sensitive to any and all issues that each person may be dealing with individually. I know these lessons have depressed my mother in the past because growing up I was the only active child (out of five) that she had. It caused her undo stress and anxiety. I think if the focus can be brought back on loving the family instead of looking to children and spouse as products, then the lesson will be a success!
If the center of the lesson is learning to love unconditionally, then the spirit will be there. If the center of the lesson is to focus on who is being “faithful” in your family and worrying over who is not, then only sadness will permeate the room.