I think the article makes the strong argument that the 7th might be easier to flip than the 6th, as it's gotten far more diverse there than the 6th.
That's a tough job, even with more decent districts. There is some truth in the idea that it's ATL vs. the rest of the state (blue v. red). There are other mini-seas of blue, but the rural parts of the state are likely to remain red, unless we get an honest to god populist movement going strong within the democratic party. That seems to me like the only way to bridge the divide between the class issues and identity politics that seems to be tripping the Dems up.