It gives you a break from the awful ingorant rapping skills from Gucci Mane, Lil' Wayne, Souljah Boy and Hurricane Chris.
I would never include Lil Wayne in this list. I think his skills have gotten better, lyrically. It's just unfortunate that he may not have the best voice for singing / rapping and the autotune only helps sometimes, depending on how it is used and how much effect they put on his voice. I haven't heard from Hurricane Chris or Soulja Boy for a while. Gucci's still lurking around..
I was in LA the day that "everybody" world premiered "Otis". Lil Wayne would've "murdered" the track if he added a verse in (and made the song longer than the short song it currently is) and I'm sure Eminem would've done his thing as well. Maybe even Andre 3000 could've been on it. Nicki Minaj would work, too, but I'd prefer the other artists I mentioned earlier over Nicki in this case. Pitbull could be the one to get on it and bring it over to the latin rhythmic side for stations like "La Kalle" or KXOL and get Puerto Rican's in the mix of all the hype for this record.