I haven't learned much about Huntsman since they trotted him out of the stable. I do know 'everybody else' the RLC hopes to push off on the GOP rank and file are losers who may turn out the base in all it's deranged, bat**** crazy glory, but won't draw much outside of that small core.
Romney is distinctly unappealing to the Protestant Fundie base, and beyond that he has a lot of dirty laundry that will definitely sink him in a general election, namely his brief but very very lucrative career in the 'Private Equity' biz, the new buzz word for LBO rackets. He was even sued by one the Party's own heroes at one point, Guiliani, over his less than exemplary deals gone bad.
Palin and Bachman are strictly circus acts.
Gingrich never had a chance.
The rest are 'also rans' material, and Huckabee refused to run, a wise, and mostly honest, man who wasn't going to carry water for the sociopaths at the RNC and RLC. He was the only one who could have done well in a general election. As it is now, while a lot of people may turn out to vote against Obama, even more would turn out to vote against the raft of idiots, sociopaths, and cranks the Republicans are reduced to having to pick from.