I was totally fine with Bruce. He sounds amazing, I even thought that he might have secured his voice a bit on CSIT.
The higher parts in the songs were really more like relaxed and natural sounding, away from the straining and pushed notes (that were some years ago).
His singing voice on the albums and tours after the cancer, it was relieving and he's managed to keep his voice taking good care of it.
Also Im pretty sure, that when he's standing there still and not running around while singing, it's the more demanding songs and parts that needs to be more concentrated. That was all just for the performance of his voice, so it's totally cool.