Add my voice to the call for the extended scene. I would LOVE to see it, though I'm not sure from your description whether I'd want it in the movie. I think that scene is pretty perfect as it is, the underplaying is effective, and I like the way the emotion builds to the final scene.
The Aussie accent moments bother me, too. It's a small thing, but why didn't they just fix that?
I like the "nothing nobody" part, but I'm not fond of his threat to kill Jack. He wouldn't really do that.
But I also would love to see just a few more romantic moments, however brief. Partly because I love all the ones that are there already. And partly because the last half of the movie is so nearly devoid of physical affection, and I really miss it. Putting more of that stuff in might not even be good for the movie in an artistic sense, as it would diminish that often-noted effect of leaving the viewer wanting more. The hell with that. I do want more!!