EWR for C-O is one of its busiest hubs, if NOT the busiest. I have seen many an angry travelers at other airports (New Orleans, Houston, Vegas) saying they can't understand as Gold One Pass elite that First is sold out to "Newark, New Jersey" "NEWARK, NEW JERSEY!"
Good luck on getting your upgrade Boomer. I've found chances increase if you take the red eyes to EWR. And even then its a 50-50 odds. CATMAN