I think it depends on the troop, and it depends on the boy...
If you're working with a new troop, it can make sense. An organized, mature Eagle, who has experience, can really help get the "boy lead" model running. PLCs are more productive when there is someone with experience as SPL. Not a long term solution, but works well when there is a big gap between older scouts and a surge of new recruits. If troop is growing rapidly, but there are only a few older Scouts, it works.
If you're a big troop, it may not be the best solution. High-speed Life scouts, who have not yet been drawn into dozens of other things (church, school, and/or sports) maybe a better fit if they need a POR for Eagle.
Don't you love the "it depends" answer!
