I thought the ending as it was was rather maudlin and contrived. I rewrite it in my head every time I think about the movie.
Why is Del waiting in the station? He doesn’t (or shouldn’t) know that Neal will come back. By all the rules of the film up to then, he should be on his way somewhere else. So why is he sitting there? Because the screenwriter couldn’t think of any better way to construct that last scene. And the expression on Del’s face when Neal finds him makes me cringe. It’s all laid on a bit thick and, for me, diminishes the film. Most of us like to think we would be compassionate towards Del, if we were in that situation, but in reality most of us would find him really annoying. It’s a childish ending catering to the overflowing self-infatuation of American audiences.