Romo's screw up in Seattle still haunts him in the playoffs (i.e. loss to Giants 3 years ago and Vikings blowout last year),also Romo, in, about 4 years of playing time has 10 4th quarter comebacks/game winning drives, Freeman, in almost 2 full seasons of playing time, has 7, and Matt Ryan, who has played 3 full seasons has 13 4th Q comebacks/Game winning drives. In a clutch situation I would want all of them ahead of Romo, and Bradford hasn't really gotten a chance to prove himself in that situation.
Going into next year, I would want all 4 of the QB's I listed, who have another year of experience under their belts, ahead of Romo, coming off of an injury, plus a new Head Coach and Offensive Coordinator to work with.