I think Scott already talked about his "singing" as being better. He stated he "screams" less and only when he wants to. That being said, I think his "singing" has never been better. His screaming/yelling voice isn't what it used to be...almost not there at times (hence the Tonight Show Overcome performance). It is blown out, but he can still "sing" his ass off. It is probably hard transitioning into more of a singer (the way James Hetfield did) than you think.