Still waiting for TDev to personally do a karaoke cover of The Final Countdown for an update release announcement
im gonna go out on a limb and say the reason why it has no sound is because then it would reveal that the engine isnt an i4 (im guessing v6)
Agree that it looks like motion blur, also might be some change to the ssao, maybe as little as other vanilla settings
Probably not much has been changed graphics wise. It's normal for content that's uploaded to their social media to have some touching up