I personally think this rating serve no purpose. Now is Recon badge count x2. People with red rating will never enjoy it. Worse no idea why their rating is red.
It serves a purpose. People who are bad at wayfarer drop to red status and their judgement no longer counts overall toward a portal's acceptance or rejection.
I think there is a lack of guidelines and transparency in it. Firstly a lot of criteria for portals are subjective. Some players in both pogo and ingress operate in groups for their group purposes. Pretty unfair for individual reviewer.
Here is the community for talking about Wayfarer. No post for Wayfarer here on Ingress community when Niantic remove it and make the new community only for Wayfarer.