This is something I've wondered about a little while now. It occurred to me that twice now, by Shakky and Nyon, Luffy has been chided for not following the newspapers and, by extension, World Events.
Oda's not one to mention things like this without meaning. Nor is Luffy one to casually disregard good advice when he hears it. So I wonder if this means Luffy, if he doesn't take up following the newspapers himself, might begin relying on someone in his crew to help him keep track (Robin, most likely, barring someone new).
If he realizes that doing so might've made him aware of Ace's plight much sooner, then I think odds are high.