Eagles mailbag: Defense's upside with Vic Fangio, Howie Roseman's job security, potential free agents

Finally, it’s here! Listeners of our show know I have an affinity for mailbags. Part of it is because I grew up counting the days until Bill Simmons’ next mailbag, printing them off to read in class. Further, it’s a way of knowing we can directly answer what’s on your mind. Also, these tend to be more conversational than the feature articles or even the analysis I write. 
So this is a roundabout way of saying, you can expect more mailbags. You can also expect them in a more timely manner. (Sorry to keep you waiting — the Super Bowl and some show projects such as “Flew World Order” pushed this back.) I wanted to take every question, but also tried to take away repeat-ish questions a...