I definitely agree with you.
spoiler
I suspect there were several deleted scenes in the ending. The 1 second blip was all that was left of the science applied at the ending. The whole using the engines as a searchlight, combined with creative use of the speed of light was completely cut down to a 1 second shot.
At the same time. I can't see how they could fit the awesomeness from the book into a reasonable length film.