This edit helps cement the idea that these people are a family now, instead of Rey being completely alone on a desert planet at the end. Her friends are there waiting for her : )
It also helps explain why BB-8 is there, he’s just a curious little friend : )
I’m gonna join everyone else in saying that this is an amazing idea! This and the new shot of the Falcon leaving really help emphasize that Rey isn’t staying on Tatooine, making the ending much more satisfying.
Combine this with DomCobb’s rescore idea and the ending would basically be perfect in my opinion.