In an seriousness, I disagree with the change but I do understand George’s motivation behind it. He didn’t want Han’s easiness around shooting because he felt threatened to be considered ‘cool’ or whatever
I just don’t understand how having them shoot a half second apart (then a quarter second, then a twelfth second, then at the same time) changes anything about Han’s appearance or motivation. Han still puts his foot up to block Greedo’s view. Han still plays with the wall to draw Greedo’s attention away. Han still pulls his gun out of his holster and change his entire mood once he has it out. He’s not doing any of that “just in case”.
If Lucas wanted to re-edit the meaning of the scene, he should have re-edited the entire scene. The single (now two) added shot changes less than nothing.