I'm not sure I understand your your solution. Rotten tomatoes is social media. Obviously if you want a nuanced option you will need to read lots of different viewpoints and opinion, but that isn't really the intention of a rotten tomatoes score. There is definitely room for improvement, but I don't think the solution is removing the option of having a quick simple gauge of how well received the movie is and if you want to get a more nuanced opinion that option is still open to you.