Who cares? It's widely regarded as vulgar and inappropriate. Star Wars is a freaking children's brand.
If they were responsible for a wide variety of TV/movies and Game of Thrones was one of them it would be a different matter, but GOT is the only known thing on their resume. These are NOT people that should be working on Star Wars.
Your objections to the pair make zero sense. Did you similarly freak out about Gwendoline Christie being in a Star Wars movie? Do you get upset that Harrison Ford is both Han Solo and Indiana Jones?
Just because these guys are currently in charge of a TV that is violent and profane does not mean that their Star Wars movies will be the same.
I think that Kathleen Kennedy is quite aware of the of who the Star Wars audience is.