Other mistake: The shot showing the vault swinging back to his location is the same that the one where the vault is swinging out, but going backwards.
Other mistake: When Batman puts the lit torch to the cable and the cable breaks; the vault goes back into exactly the same place where the helicopter lifted it out from; connected via a grapple that Batman put through the wall. Ignoring the logistics of how this would be possible, it tightens the grapple, which surely, with the weight of the vault, would have ripped itself away from the wall.
Other mistake: The headline of the newspaper says about Two Face robbing Nygma's party and Batman saving the guests, but the body of the text is about Thomas Wayne's death.
Answer: It's hard to say for certain. If Bruce had approved of the project, there would have been a lot more volunteers and oversight of its production, which would have alerted Bruce of the device's side effects, at which point he or one of his underlings would order its production to cease. Edward would still feel spurned and motivated to continue his work, but without the resources of Wayne Industries at his disposal, he may have a more difficult time seeing his plan through.
Phaneron ★