Jon Huntsman has plenty of good qualities. For example, his willingness to become ambassador to China when asked by President Obama, because both he and the President recognized that he was the best man available for the job. Working with the other side when it's the right thing to do makes good sense, but of course does not allow you to win the Republican nomination when the whole party has fallen off the conservative side of the scale.
A number of potentially strong candidates chose not to run, saving their energy for when they have a better chance. There are other very competent candidates who weren't interested, but might be persuaded to come out and try it in 2016, like Condi Rice.
Until they move back toward traditional Republican values and away from the nutballs currently controlling the party, I doubt that they'll get anybody elected. Step one: disavow their Grover Norquist "never vote yes on a tax" pledge and embrace realistic solutions to real problems.