Hi @JuanPablo Thanks for the feedback. We've had other users reach out regarding this as well and it's something our team is looking into already. I will keep you posted on here when this feature is live 
I don't have a timeline yet, but I'll be in touch 
In the meantime you may be able to workaround this by disabling the rating component and overwrite the CSS to remove the grey-scale - something like
yourSelector {
filter: none;
}
You can find some good tips and tricks on how to use CSS on your apps here.