I think he is quite struggling with the high notes of Art Hounds. Maybe that's why he doesn't sing it in concert.
Probably so but honestly his falsetto was never great. Like I said above I do think he's lost some of the high notes which is typical as you age but his lower register has come in strong and suits a lot of the song new and old. As to lyrics I don't know.its a discussion had on here a bunch of times but in general his lyrics have never been as detailed as they were in the smiths but I thought world peace was great myself. It's the south paw era for me and some of vauxhal that kinda sounds meh. He's a lot more direct these days as are the songs to go with them for the most part but on world peace I found him at times very funny and moving. Same with quarry which also had some superb lyrical moments