We could also consider migrating the CFC rating to the Glicko-2 rating system. The Australian Chess Federation has already done that. The system gives both a rating and a measure of the reliability of the rating. If the CFC rating of a given player is really unreliable, this will be shown.

https://en.wikipedia.org/wiki/Glicko_rating_system
http://auschess.org.au/acf/ratings/