Hmm, I still think EVERYONE that saw it originally knows that the impact triggers the pack.
I can somewhat see your point looking at it from an editing standpoint but it still was not necessary and doesn't add to anything, just inserts another angle of the same thing.
Why not also do the "anime-editing cliche" and show the impact three times for emphasis! :rolleyes
If anything should have been altered, it is his lift-off. Again though, not really needed.
Not meaning to derail but as for Anakin, that was actually not "done just to do it", he made it fit into his reasoning that he would have returned to the way he was before he lost himself. Dumb, yes, but it fits the story. Artoo's ROCK HIDAWAY from ANH, on the other hand (and only in a couple shots:rolleyes), is one of those whimsical changes.