Here is the thing with Eddy.  He needed the US Title, because when he first started getting over, he was fresh off a stint in the tag division.  He needed to be built up first.  Since then, he's been dominant, including a big win over Cena and successfully defending both titles in the same night.  Currently, approximately 1/4 of each show is built around him and he is more over than RVD was in 2001.  He can easily move up, if they choose too.  Although personally, I would have him win in the main event of Wrestlemania.  He has that much potential at this point.