Lets examine a few of these New Balls, shall we?
Hewitt and Safin have both won slams, and reached number on in the world. Safin has been in the semis of every slam except Wimbledon, where he has been to the quarters.
Haas is a two time slam semi finalist, masters series winner, who has reached number two in the world.
Ferrero is a two time semifinalist, and grand slam runnerup, two time masters series winner, former number two player in the world.
Guga (who was by no means NEW anyways
), has won masters series, a slam, the masters cup, and reached number one in the world since the New Balls label was given to him.
You're right, they are pitiful.