Blimey that took me back! I loved that track. You guys are younger than me (I was 19 when that was released). Its brilliance, in addition to what you both say, is Lennon's subtly cynical voice. Its written by him I think, not McCartney?
It is a Lennon lyric, mainly. Here's the weird thing: I'm a huge Lennon nut, but McCartney's bass line, and Starr's snare work on that, and even Harrison's rhythm figure on the guitar are all so perfect, that for me at least, Lennon's lyric is the weak spot. How often do you get to say
that?
His vocal is just wonderful, though, isn't it? "I'm So Tired" is another one where he just nails it vocally.
I just watched "Get Back" on Disney+, the 8+ hour Peter Jackson documentary of the making of "Let It Be," and what blows me away with that is the opportunity to see just how good Lennon could be vocally, with very little effort.
Much of it is just McCartney and Lennon playing off each other, like schoolboys, and can get a little tiresome, but every so often, Lennon would just let out a perfect vocal line, effortlessly and almost lazily. Goosebumps for me, that's for sure.