I have the current version of WP User avatar (4.1.2) on a multisite, although it isn’t network activated, it is only activated on one sub site. According to your site there should be options to pick images based on user roles but I don’t have this option with my install. Have I done something wrong?
No, you are confusing, according to our site you are able to set user avatar according to role-based users means you have set default user avatar for your editor and similarly for the author and goes on.
I hope you got it. Please let me know if you have any confusion.
You are not getting "Role-Based Avatar" option because you have selected "First Letter Avatar" radio button. To enable role-based avatar, please enable wp user avatar as a default avatar then you are able to load "Role-Based Avatar". I have enclosed screenshot.