1) It's definitely an early take in that not only is it incomplete, but you can tell that the band was unsure of the bridge, so the playing is somewhat tentative.
2) Listen to the "stereo" track. When stereo was new there was no such thing as a pan pot on a console for a few years. Consequently, the only choices the mixer had for track placement were hard left, hard right, or both tracks simultaneously. What you hear on this track is an early attempt at stereo, with the drums and bass on the right, and the guitars on the left. This makes it pretty easy to pick out the parts though.
3) Listen to how tightly Paul and Ringo play together. It's especially noticeable on the build at the end of the bridge where they're both together not only timing-wise, but phrasing as well.
4) Listen to the sound between John and George's guitars. Both fill different frequency spectrums perfectly, without the need for extensive EQing (they hardly had any EQ in those days). Also listen to the interplay between the guitars, with John playing a steady rhythm to George's mostly single note lines. This was and still is an excellent example of guitar arranging.
5) For an early take, the energy of the track is great! The Beatles could certainly rock when they wanted to.
Don't forget to check out my Music 3.0 blog for tips and tricks on navigating the music business.