Could you add a setting that allows us to rate on a 10 point scale, similar to how Anilist does? I know the standard for games is 5 points but that feels much too little to me. If 10 points is a problem, maybe allow the option for decimal scores such as 4.5?
While there is no plan to change the 5 star system. There is a plan to eventually allow custom rating systems in the future. You can read more about it in the following forum thread: