He was loved by Bills fans, but overrated? Not sure about that. I don't remember any rational posters calling him the best RB in the league anything like that. He was a complete back at his peak though, in like 2010. Not the best in any one thing, but average to above-average at everything. Could certainly close out a game.
Buffalo relied on good RBs for so long, it's really weird to prop up Moss at this point.