Church revitalization begins with knowing your why, your reason for existing, the irreducible minimum that everything else either supplements or, occasionally, is at odds with.
If you know your why, it’s easier to figure out what you must do, what you can do without if you have to, and (sometimes) what you need to stop doing. But it’s hard, because everyone in a church already has a why, a reason they attend church, support it financially, and participate in its community and ministries. Most if not all of those why‘s are good reasons, and most are roughly aligned with the why‘s of the other people in their church.
But most churches don’t do the hard work of figuring out their why. If it ain’t broke, why make waves, etc. What if you figure out your why and your best friends at church have a different one?
But it’s not just churches. Major League Baseball has the same problem. (And they charge a lot more for season tickets than churches do!)