Yes, that could have been called, just as a couple of other calls could have been made that impacted the score in favor of the Falcons. Maybe Julio catches that ball if his arm isn't tugged, maybe he Doesn't. Maybe if he does, Ryan gets crushed and fumbles on the next play.
Falcons got there share of officiating love in this game, just not at the end. To say that that was the difference is ignorant at best. Maybe Atlanta shouldn't really on a desperate throw at the end of the game to get in to long field goal range? Maybe they make it, but guess what, that's how things are called in the NFL. Those calls that went for or were not called in Atlanta's favor in the 1st and 3rd quarters are not going to be called in the 4th quarter. Period. Road teams to make it not matter, that's the NFL way.
Atlanta has a solid squad and I don't doubt the Hawks will lock horns with them again before the season is over, just need to lick their wounds and take it out on the next team.