I agree with you guys, it would be awesome if the fans made the dub, we would know what to keep in and stuff. But then again, Nelvana already made the point of making the show for MALES, so maybe that's why they didn't give any introductions for Sakura. Not only that, Sakura in CC was captured as a secondary character..so maybe it isn't something to do with cultural diffrences, but rather to equalize the characters. We know that Syaoran didn't get much of a big introduction, in fact, his history was pretty rushed. Not only till we saw the Erase episode did we know some things.
And if it had to do with cultural diffrences, well then, it would have been a good idea to add in some stuff about Japan and stuff. It would make it really intersting, but this show was intended for kids, I highly doubt they'd read the stuff. Not only that, CC was based on action, I really don't think Nelvana even THOUGHT of making the show educational.