They have pushed ODB. It can't hurt to give her a big push again, but it's not gonna help anything either.
ODB is kind of just one running gag that's been dragged out for years. Her character is basically the ultimate redneck barfly in which she's crass, vulgar, drinks too much and will hump anything that gets within reaching distance. At times, she's been pretty damn entertaining. Other times, she's been embarassing to watch. Basically, she's got all the standard positives & negatives for comedic characters. It was fun for a while but, all in all, it's just kind of stale. If anything, her character has only become more ridiculous since being paired with Eric Young. She doesn't seem edgy so much as she just seems like someone that can generate a cheap laugh.
None of the Knockouts in TNA strike me as being particularly interesting right now. Mickie James' "hardcore country" bit is old. Tara's playing the Hollywood cougar. Gail Kim is...well she's just dull as dishwater Gail Kim. Madison's beauty queen character is possibly the stalest of any Knockout right now. Sarita & Rosita are pretty much gone at this point.
The appeal of the Knockouts Division as having its champion be a top notch talent in the ring isn't as high as it once was. When it comes to sex appeal, Velvet is clearly the top Knockout In my opinion as she's really one of the only characters on the roster that uses the fact that she's extremely hot as part of her character.
At this point in time, however, I think whomever gets the push to be the next KO champ will ultimately feel like someone that's just carrying the strap for a while. Like the X Division and Tag Team Division, the KO Division needs fresh blood injected into it. I think that's the only way things have a shot of truly picking back up for the KO Division as a whole.