I haven't read every response in this thread but there seems to be a general misconception that Morrissey is a songwriter. So, where once he wrote something as subtle, beautiful and poignant as I Know It's Over, he now writes the clumsy, tuneless bluster of All You Need is Me.
A quick point of clarification - MORRISSEY HAS NEVER WRITTEN A SONG IN HIS ENTIRE LIFE! He is not, and has never been, a solo act in any meaningful sense of the word. He went from having Johnny Marr write songs and play the guitars to Stephen Street, then to Mark Nevin, Alain Whyte etc. Post-Smiths he's presented himself as a solo act but he could hardly be less solo.
He is a lyricist. The reason I Know Its Over, Maudlin Street, Well I Wonder, Will Never Marry, I Won't Share You, Please Please Please etc are things of absolute beauty are because Stephen Street and Johnny Marr wrote absolutely beautiful pieces of music.
Unlike many others round here, I'm not a Jesse basher, but he never writes musical compositions which could be considered beautiful or understated.
Marr and Street could easily come along tomorrow and hand Morrissey another gorgeous twinkling gem of a composition, Morrissey adds a few lyrics, and we have another beautiful song on our hands.
If we're gonna discuss the alleged decline of Morrissey, it only really makes more sense to focus on the words which are his responsibility, and his alone.
Although Morrissey has some say in the way the music is presented, it's certainly not a strength of his. His musical judgement is somewhere between poor and dire hence his recent announcement that the plodding mediocrity of That's How People Grow Up is one of the songs he's most proud of, and ludicrous musical decisions in the past such as releasing Dagenham Dave (officially his worst ever single) but hiding the genius of Nobody Loves Up on its b-side, releasing a bog-standard album track (Glamourous Glue) as the lead-single to his compilation album of last year, putting out Roy's Keen as a single, only to realise 10 years later the song shouldn't have even been released at all.
Anyway, err, what was I saying. Oh yes! It's the lyrics that he's responsible for and I'd argue that from Quarry onwards there's been a real drop in quality. We still get great lyrics and great songs from time to time, and I'm really pleased he's still writing new stuff, but they're the exception rather than the rule these days.