Sometimes I wonder if it would have been better for Lucius and James to have been rivals. [Now calm down, I do enjoy the story we have -- I am not saying that I don't.] Not only would it have made Snape a little less... obsessively creepy towards HP's mother, but it opens up many possibilities to Draco's arc. Draco's redemption arc was poor (one can argue it is almost non-existent in the books), but what if he becomes close with HP by the end of the story (not necessarily friends), and it shows that his and HP's generation has broken a Malfoy-Potter feud.
I don't know, I just believe it could have been a fun arc to explore.
What do you-all think?