Meh. I think the song was ruined when they wrote it and it really doesn't matter who sings it.
That being said, I think Joey does a good job here and sounds pretty good. He is obviously being held back by sub-standard material but he does a good job with what little he has to work with.
I agree with you and wish that they would leave the Bush era songs alone. No reason to recall that sub-standard era of "Anthrax". Just keep to the good stuff (P.O.T. and back) and continue writing solid music, which is what "Fight 'Em...." sounds like its going to be.
The quicker Anthrax forgets about the Bush era, the better their chance of resurrecting their career. Hopefully, "Fight 'Em...." is a sign of things to come and Anthrax can put the low-lights (SOWN-WCFYA) behind them.