My own preference is for someone to demonstrate useful versatility, and showcase their interpretative abilities. They should have the courage to take a risk, and when they do be enough of a singer to survive it. One of the problems with including a genre artist in AI is that it can become a battle of the genre, rather than of the singer.
C&W music is big business in America, one of the biggest markets and one where album sales have not declined like rock and hip hop have. R&B does not do as well as it once did, so if you had an R&B artist up against Scotty, and the R&B artist never budged from their own genre's singing style like he doesn't from C&W, it'd be unlikely that the R&B artist would ever win, not unless they were vocally extraordinary, because his/her music genre isn't anywhere near as popular.
Having a contestant in a show who represents the most popular genre and they never attempt to do anything different is giving them an unfair advantage IMO. A one-trick pony on an easy ride.To test Scotty's mettle as a singer and a person I'd like to see him step outside his comfort zone and sing something completely different and in a different style. After all, his childhood hero, Elvis, started out as a country artist but could also do rock 'n' roll 'rather well'.
There's a danger in being a genre artist. Crystal Bowersox is said to have sold more albums than last year's winner, but given that she was similarly congratulated for being 'authentic' and 'true to herself': "a fully finished artist", you'd anticipate that she'd sell rather more than the reported 19,000 copies extra (with her and Lee selling less than any previous top 2). The problem for her, unlike the more versatile winner if he gets another chance, is that she hasn't tried to convince anyone she can change or even wants to, so if her music genre fails to sell well enough the first time, her recording career is likely to be over.
Scotty's genre is much more bankable than Crystal's, and the more musically conservative and traditional you are in C&W the better, so I do see him having a career. But would it be fair he should win by appealing to a large body of fans of the most popular genre to vote for their boy rather than pushing himself and demonstrating a wider ranging singing ability in a singing competition?
I think the genre contestant benchmark should be Chris Daughtry, one of the finest singers to never reach a final. He sang rock most weeks, but there was one week where he was encouraged to drop the macho stance at the microphone and the power vocals and sit down on the stage to sing What A Wonderful World, and he did it rather well. I've also seen a video of him singing the US national anthem at a sports game, and, while he avoids the high note on "...land of the free", he manages to turn in a very potent and original performance without giving everything his usual full power. In so doing Chris demonstrates that he can sing in different styles and IMO is much more of a singer for it.