It may not be necessary, but I thought some form of alien dialogue would help explain why he turns, other than the random distant shouts in the original. The Hosnian destruction leads to our expectation of that reaction in the original since we want him to turn and notice it, but not when that scene has been excised. We just assume he will look to the sky because we’ve watched that again and again in our edits, but for someone who is watching this for the first time, there may be some slight confusion.