I'll second the suggestion that articles need to be rated for applicability. I simply have no idea which ones pertain only to Civ4, which ones pertain to BtS, and which ones take into account BtS 3.13+ Bhruic's fixes. An icon, or series of them, should show applicability, and the authors of them should be encouraged to check their articles and either validate that they are relevant to the newest patch/edition, or update them so that they are. (Naturally, I'm not talking about whipping them into submission to force them to do this; some people just don't have the time/inclination to keep up with the changes, but if it became a more common practice to have UP TO DATE articles, that would go a long way to encouraging the authors to do this. The ball may have to be gotten rolling with a friendly email reminder or two.)
I've not made any such articles myself for Civ, but I've done it for other games, and when new rules came out, I at least did my loyal followers the service of letting them know how the changes affected what I provided.