This Watch Dogs Mod Will Give You the E3 2012 Experience

As Watch Dogs neared release, gamers began to notice that something was different between the game's E3 2012 reveal and the final build, citing much worse lighting as the main culprit.

Over the weekend a modder named TheWorse posted this thread claiming he had found the E3 2012 lighting and additional improvements and tweaks already existing in Watch Dogs' PC release's data. By modding an XML file, these effects can supposedly be unlocked, giving an undeniably impressive result, as you can see in this video.

If the modder's claims are legitimate, why would Ubisoft choose to leave these effects out of the PC release, especially after the backlash they faced following the perceived change from the E3 2012 reveal?

What do you think? Is there more to this than meets than eye? Let me know in the comments.