His customized belt has absolutely nothing to do with his workrate. It fits in with his character perfectly, is executed well enough so it doesn't look like "a hubcap" (and I don't give a shit, anyone who keeps using the hubcap line is a fucking moron), and it gives an otherwise lifeless secondary title some recognition. It does more to remind you that Cena's the US Champion than the normal belt would have. The only foolish part about it is that he has a personalized secondary belt when he's pushed to be a regular main eventer at some point. I think it really boils down to a bunch of (yes, I'm using the HHH/WWE/JBL line) smark nerds behind their computers who can't even understand why or how Cena's popular and maintains that popularity in the first place. I hope he has a real Sprewell WWE Championship belt made for when he does beat JBL down the road, not one big piece, but a narrower piece with the same circumfrence spinning over the actual centerpiece of the belt. The old-school Word Life WWE logo spinning over a circular center medallion would be the shit.
Fuck, did people bitch this much when Bradshaw Tex-ified the Hardcore belt or Austin had the smoking skull belt?