Congratulations, CheekyMonkey! I LOVED that calling!
I think you need to start by making sure that every ward RS president understands how the new Enrichment program is supposed to work. Specifically, that they can (and should) have activities that appeal to a specific demographic within their ward (although everyone is welcome). For instance, in a "Newly-wed or nearly dead" ward, they might have activities in the evening after the younger women (or their husbands) get off work, but daytime activities for the older sisters who don't like to get out in the evening. Younger women might like a discussion of children's books, while the older women might like a class on long-distance grandparenting.
Also, what worked really well in our stake, and appealed to everyone, was getting the sisters excited about doing projects for the Humanitarian Center. There were older sisters who had just about given up on life, when they learned about the hand-made items that were needed. Being able to do something productive, even if they were homebound, made a big difference in their lives. And of course, everyone likes service projects (like the baby blankets our ward just made) that give them an excuse to socialize!