I've seen arguments recently that the number of representatives in the House of Representatives should be increased to make the chamber more, uhh... representative. It's been capped at 435 since 1911, but our population has grown a good bit since then. The bonus effect (on top of better representation) would be that the Electoral College would much more likely track the popular vote.
Upping the number of representatives has been something that's been talked about for quite awhile. It would really only make a difference in the Electoral College in the case of really close totals though.
As it is, the House is big enough that I don't think it really is all that representative of anything. There are so many of them that power is concentrated onto only a few of them with the rest following suit. Increasing the numbers would only exasperate that problem. As it it, arguably the Senate is more representative of the nation, even though it's smaller and literally wasn't even meant to be.
Funny side story. A law professor published an article to say that the Senate could become proportional by passing a simple law. He is still teaching law students and has yet to be fired for gross incompetence, so that tells you something.