actually, thinking more of this scene...i like it more and more.
first, i think zett is remniscent of padawan obiwan in ep.1....spinning and kicking the mess out of battle droids.
second, his death is significant and it's not just some extra shot so lucas can be a popular dad. the younglings represent the future of the jedi order....they die. Zett is a little older so i wouldnt bunch him into that symbol, but i would say that his death is the death of the jedi as loyal protectors of liberty.
maybe you think i'm stretching. just food for thought.