Abbey Road is flawless. Lennon may have later claimed that he was wholly opposed to the medley idea, but at the time he was delighted with it.
For he knew, as McCartney did, that it brought a unity to the performance that simply slicing the songs into their composite fragments could never have done. The band sounded like a band again, and it didn’t matter, as McCartney told the London Evening News, that, “We didn’t do harmonies [together] like we used to.”