My attitude in terms of Ali and Roberto is this: Just because other "non-stars" were cast, doesn't mean they should cast even more "non-stars." IMO, people from The Bach and B'ette have utterly no business on this show, unless it's an emergency last minute sub, like Melissa was. That I can understand. So, count me as one who's thrilled not to have to endure an Ali-Roberto-Bachelorette infomercial. And I say that as someone who likes Roberto and doesn't mind Ali.
Unrelated, but I think Chelsie is in fact paired with Michael Bolton. Her Twitter page talked about going to Louisiana for the weekend. Michael was there for a concert. Meh. Not sure what I think of this, but at least she didn't get saddled with "The Situation" and all his ridiculous glory.