I didn't watch Ream at all in the Championship at all, his game really fell off that bad? That's a pretty damning statement on the quality of the Championship!
I feel like he had already worked his way out of the USMNT picture by the time he even transferred after a few horrid performances in some friendlies, ironically enough because he lacked the physicality.
I don't think Ream fell off at all during his time in the Championship , he was picked as the outstanding player on the team several times. He is now a regular starter in the premier league although his team Fulham is in the relegation zone