I'm not so sure. As someone pointed out, if he knew this would be the last tour, they'd market it as such. Unless they think they make enough tickets and money anyways, which seems to be the case.

I'd still say the decline has stopped for now, instead he's making small improvements. Which makes sense, since he seems to have to relearn the songs to know which voice/technique to use for which lines/words. Will it get better to a tolerable level? Or will it get worse after improving a bit? Time will tell...

I sure hope this isn't the last tour, because I'd like my kids to see them and they're too small yet, but dig the music (THINFS and Roller Coaster, to be exact) very much.