One of my Scouter buddies who retired from BSA around the same time I did, was just voted "Potentate" of the local Shriners. Perhaps BSA should consider an "Adult Division" where those over 18 can continue in the program, but separate from Cubs or Scouts. Work on skills and activities with adult peers, not with the youth.
Age limit for Eagle ... I've turned the corner on this. I'm thinking this might be a good thing.
* Some adults want to work on skills at the same time as their kids. ... Example - Karate black belt
* Some adults want something in their life to work toward.
* Some adults want to make up for opportunities lost as a kid.
* Many adults are lonely and seeking friendship and social connections.
IMHO, I don't see harm in this. Perhaps a correction to scale rank requirements should to age and capability. Perhaps keep the same.