In those situations of 'partial' chords, there are other instruments that are filling in the blanks. .....just as the bass does in this song. The Beatles were definitely a notch above simple pop music. They delved into Broadway music, which definitely doesn't stick to simple majors and minors.
"there were birds, in the air,
But I never heard them singing.
No, I never heard them at all,
'Til there was you."
What they didn't know, George Martin did, right?
They went to E becasue that is the key of the song, right???
AS for hearing the change, Iheard the change to soem form of C chord immediately....it just took a bit for thigns to gel and for me to come to the Caug thing. The writen music confirmed the chord. Tehchart underneath the chord shows the same thing.
Call it want you want, but once again....if you write C#m(maj7)/C....and someone who isnt' really hearing the change inserts a C# note somewhere in that chord, there is going to be discordance. IF you write Caug, there is no problem.
Whatever, if we were playing the song together, we coud get along msucially, right?
Have a good one, jbmando.