I guess you must think Billy Beane is stupid. At the time of the trade, Milone was projected as a backend starter. Lannan and Maya are also considered backend starters at best. Why would Beane and a low budget team ever consider to trade for an expensive backend starter when a cheaper alternative is available ??
Beane did a stellar job of rebuilding the As by dealing Gio and Cahill. I know there were some other players involved, but those were the 2 centerpieces. How well are the 4 former Nats doing that came over in the Gio trade ? Well we all know how well Milone is performing, but Norris was just recently called up and is off to a hot start. Peacock and Cole are considered the number 2 and 4 prospects in the A's system. Not a bad outcome for the As. The Cahill trade was just as good for the As. Jarrod Parker is a future ace and is putting up Gio type numbers. Ryan Cook was picked for the All Star game as a reliever. Collin Cowgill has about 100 ABs in the MLB and was showing some promise before ending up on the DL with a sprained ankle.
Beane accomplished just about everything he set out to do in the trades. He essentially replaced the production of the players he traded, added several players who all have a good shot of not only making it to the majors, but should have promising careers, and lowered his payroll all at the same time. Thats' why they make a movie about the guy.