I'd always flub this one up at the very last chord

So did I. I learned it from the Hal Leonard songbook -- it's one of two or three songs they got right -- and always felt compelled to make up a better final chord. folderol and's last chord sounds great to me, but it's even easier to play if you drop the 4th string/5th fret and just pluck the 6th, 5th, and 2nd strings.
So instead of:
FIG 5
e |-0-|
B |-8-|
G |-0-|
D |-5-|
A |-7-|
E |-0-|
(strummed)
it sounds like:
|-X-|
|-8-|
|-0-|
|-X-|
|-7-|
|-0-|
You can check the video performance of this song on Good Morning America:
http://www.youtube.com/watch?v=QQdcLJgjz-EThe camera angles aren't particularly conducive to studying guitar technique, but I don't think Liz has ever looked more beautiful on TV..........

You can make out the fingering for the last chord fairly well.
One other issue I have is with this section:
FIG 4a
e |-----------------|
B |---3-3-3-2---2---|
G |---0-0-0-0---0---|
D |---2-2-2-2---2---|
A |-----------0---0-|
E |-0---------------|
The Hal Leonard transcription has it like this:
|------------------------------------|
|-----3----3----3----2--------2------|
|--------------------2--------2------|
|-----2----2----3--------------------|
|------------------------0--------0--|
|-0----------------------------------|You can't see that part in the GMA video, but to me it sounds more like (X0X22X) than (X0202X); I've never really heard the 7th in the A7. What do you think?