Of course he's fine with it. It's exciting to be a part of something with so much anticipation and buzz. This "it's a waste not to have him sing" is a fan feeling -- not the actor. I'm not saying he doesn't want to, or might not have been disappointed had any song he had (or thought he would) disappeared.
If we're not having fun, then why are we doing it?
These are DISCUSSION boards, not mutual admiration boards. Discussion only occurs when we are willing to hear what others are thinking, regardless of whether it is alignment to our own thoughts.