He seems to be struggling more and more from the footage I've seen from this tour. If you watch some of the performances of Blood on Blood on youtube, he looks like he's making very hard work of it!

Melbourne BOB:

Sydney BOB:

Even Richie is singing the backing ("So young") an octave lower now - although he did this sometimes on previous tours too, even as far back as the Bounce shows.

He is still a great singer though even if he isn't quite as phenomenal as he used to be.