Everyone has their own kinks and preferences, but 'make uglier characters' is not one I see that often.
Regardless of physical appearance, neither of the characters mentioned have great personalities or interactions with the MC so far. Even if RJ was to add more characters I doubt they would even register on a list of requests or votes. I think Mrs. Mills is the closest you will ever get to what you're looking for and she consistently ranks at the bottom when it comes to favorite characters.
Like Grim said, we already have a huge roster of partners that already have more diversity than any other game out there. Each one is tremendously written with their own personalities, backgrounds, desires, interactions etc. I don't like all of them but there are several that I really like. I for one am going to continue to trust RJ to do her thing, because she's done a damned good job so far.