Ensemble Dark Horse: Plucky sidekicks Willard (a dancing novice for added bonus) and Rusty. It arguably carries into their other versions as well.
Fridge Logic: Where did they find a DJ in a town where rock music and dancing are illegal? You wouldn't think there'd be much call for someone to spin tunes for an audience.
The dance was actually held in the next town over, where rock music and dancing are legal. There's a brief scene where Ren's boss points out where the town border is very close to Beaumont, allowing the teens to have their dance party close enough to have it be a gesture of defiance without actually breaking the law.
Ren's little cousins were decently liked in the original movie despite their minor roles, but are even better-liked in this version.
Caroline is one of the least prominent named high schoolers in the movie, but has a fair amount of fans for her Tomboy moments during the demolition derby.
Andy Beamis, for retaining his Benevolent Boss interactions with Ren from the original movie while providing more hands-on help to the heroes once or twice. The Genius Bonus irony of him being a black man who owns a cotton mill in this version also draws some interest.
Ren's uncle talking the judge out of giving him a harsh sentence for playing music, by appealing to the days they did the same thing.
Ren and Reverend Moore talking about what reminds them of their dead loved ones in the church and coming to an understanding.
Like in the original, Shaw and Vi doing a slow dance together.
It's the Same, Now It Sucks!: A common complaint about the remake. The movie isn't completely the same (among other things the death of Ariel's brother is made clear from the beginning, the chicken race is turned into a bus race, and Ren's relationships with his uncle and Shaw are altered), but the main plot points do follow the first movie, for better or worse.
Les Yay: Ariel and Rusty are shown holding hands while they walk to the race track in an early scene, and when Rusty berates Ariel for risking her life on a whim, Ariel asks if Rusty is going to leave her over that, then kisses her on the cheek later when they make up. These moments give some Ambiguously Bi subtext to their interactions.
Signature Scene: The best-known scene from the 2011 remake is the scene in the country bar where Ariel, Ren and Rusty take part in the line dance set to Big & Rich's "Fake ID".