Yeah, that's pretty awesome, it wouldn't alter the introduction of Luke but it would add that awesome scene back. I really like that scene (much more so than the one where his friends don't believe him about the battle, which is pretty crap) it gives you a much needed idea about why the Empire is so bad and it has a great pay-off in the Yavin battle, when Biggs dies.
And there is apparently a gap between the diner scene and the sunset scene, as the dinner takes place in daylight.