Yea, it's not greatness, we can agree on that.
For me Coming Up is a great song, but badly (home)made, if this song had been made by a black artist on Tamla Motown with great voices, rhythms and some brass it would be fantastic imo
Former band-mate John Lennon liked the song and credited it for driving him out of retirement to resume recording.
Somebody asked me what I thought of Paul's last album and I made some remark like I thought he was depressed and sad. But then I realized I hadn't listened to the whole damn thing. I heard one track - the hit, 'Coming Up,' which I thought was a good piece of work. Then I heard something else that sounded like he was depressed.
— John Lennon, All We Are Saying, 1980
I heard a story from a guy who recorded with John in New York, and he said that John would sometimes get lazy. But then he'd hear a song of mine where he thought, 'Oh, sh*t, Paul's putting it in, Paul's working!' Apparently 'Coming Up' was the one song that got John recording again. I think John just thought, 'Uh oh, I had better get working, too.' I thought that was a nice story.
— Paul McCartney