I don't think they let Rinna go because of her grossness, but more because the buying public, stopped buying her crap.
All of her crap is on clearance. Stuff that was $50, sells for under $20. And now they have a Full House kid on "designing clothes" for them.
I think, before Rinna, it was Bitsy Hasselbeck, former shrieker, at times in a pitch only dogs could hear, from The View.