I guess you could take this thought to a deeper level and say that the reason why the raiders march was not used for the YIJ adventures was because Indy's character is not yet "developed" enough for such a powerful score.
Its also kind of the reason why Indy's fedora doesn't seem to fit him either. If you notice, its a little big on him. Well, thats symbolizing the fact that he still has room to grow.
That's my thought on that.