Kimberly is agood fit to what I like to call "Traditional American" style. She is more average and mainstream than Mitch. Mitch I think would have, talentwise and being original, deserved to win more, but his taste propably would be too minimalist and modern, not the average person's taste in United States. Just a walk through your average furniture store will tell which one represents the majority taste, that is definately Kimberly. So that in mind they chose the right person. If they wanted to have a new stylemaker with fresh ideas and potential to change things, they chose wrong. Kimberly's magazine cover would blend in nicely with what is already there and be forgotten. Mitch's would grab attention as something different, and if he could live up to the expectations it might even have a future of some sort. Kimberly, well, she is a nice person and all that, but she is more of a puppet in my eyes, just doing what everyone else tells her to do.
And yes, Martha is out, this show ended barely in time