First, I know damn well that I'm going to get bent over a stump for suggesting this, but I hope that you will take the time to examine the reasoning.
Jones is likely to become one of the highest paid receivers in the league. We're talking 15 to 20 million a year. With Matt Ryan also on the team, and also eating up 20 million a year, we'd be using up 30% of our salary cap on two players.
Adding Julio Jones was supposed to put us, "over the top." The Falcons have had two straight seasons of losing football with Jones coming into his own. Obviously, he wasn't the missing piece of the puzzle. Investing 15-20 million a year into a player that has not helped you to a winning record for the past two years, doesn't make a lot of sense. I know that the same can be said for Matt Ryan. Finding another wide receiver who can account for 1,000+ yards is a lot easier than finding another QB who can throw for 4,000. The point is, if you tie up all of your assets into two players, the team isn't going to be that great. I'd rather split that 15-20 million a year between a WR, a TE, and an OL (5-7 million per player) rather than sinking it all into Julio Jones.
The teams who pay big money to wide receivers do not often make it to the superbowl. Playoff games are typically won by teams with good/great defense, and good/great QB's. Have a look at the top paid WR's, and see how well that translates into playoff wins:http://overthecap.com/position/wide-receiver/
Julio, though often injured, has value at this point. When healthy, he is absolutely one of the elite receivers in this league. People will buy tickets just to see him play. SOMEONE should be willing to make a move to get him, as we were several years ago. The Falcons could deal for players, draft picks, or a combination.
With the savings in money, plus the additional talent acquired through the trade, the Falcons would be able to do what they need to do to get this team back on track. We have the one thing that most of the teams in this league cannot find, a great QB. If we can protect him, put a good defense on the field, and keep enough young talent coming in the doors, the Falcons can be a playoff contender for a long time. If we keep Julio and Ryan together, we're going to have a flashy offense, but we're not going to be able to afford to put together a decent defense, and it's going to be hard to keep any other talent that we find.