Though there is a lot to enjoy about this set, I thought I'd list the top ten things missing from the set:
1. Not many "ensemble cast" segments with just Muppets... There are some ensemble scenes/group numbers with the humans, many of which include Big Bird, but it would have been great if the set had included some scenes with groups of characters including some not normally seen together. Things like Prairie Dawn's pageants, The American Revolution: The National Bird, Mystery Guest, Do De Rubber Duck (though the song has already been released on DVD multiple times and there are enough Rubber Duckie songs on the set), and The Kings Nose.
2. On a similar note, while there is plenty with the humans, the set doesn't really have any "cast inserts". What I mean is the kidn of wacky inserts fromt he early years featuring the humans, doing such activities as building letters and numbers, sometimes with the video sped up. And there's not any inserts with the cast playing different roles (or is it the cast as their characters playing roles?).
3. No Kermit and Grover or Kermit and Cookie Monster pairings. Kermit and Grover have had many great moments together (their "salesman" bits, Health Minutes: Teeth, heavy ans light...), and so have Kermit and Cookie (I would have included the feelings lecture or Kermit's mystery box).
4. Aside from the "Snuffy is Seen" clip, there's no segments referencing the fact that the adults didn't beleive in Snuffy (well, I guess traveling to hawaii in a net tied to a helicopter was done so he could avoid being seen...). And no "near misses" clips, either.
5. No "Jazz Numbers" clips. Seriously. Only Jazz #2 has been released on DVD. And only two of them can be viewed at sesamestreet.org.
6. No Guy Smiley, Don Music, Sherlock Hemlock, Biff, Sully (aside from a mention in "Telly Plugs In"), Gladys, Placido Flamingo, Twiddlebugs, or Harvey Kneeslapper. Many of these characters were consistiently on the show for many years, and are surely remembered by many fans. Of coruse it seems like most of the chosen clips are about three minutes long or less, and I know that many Guy Smiley and Don Music sketches are an average of four minutes long... But most of the best Harvey Kneeslapper sketches are about a minute long. (another thing that I noticed: A few of those characters made on-screen appearances in season 40)
7. None of the early comedy duos (Buddy and Jim, Larry and Phyllis, Wally and Ralph) were included. The first two only have one sketch each available on DVD, while none of the Wally and Ralph segments have been released. And none of their sketches have been uploaded online by Sesame Workshop.
8. No "season one Big Bird or Grover" sketches. We got an orange Oscar set, but I think the first Big Bird and Grover needed to be seen and heard on this set.
9. Additionally, there's nothing with Brian Meehl as Telly (or Michael Earl as Snuffy). It's great that we got to finally see and hear the original Telly (with Bob Payne as the character), but Brian Meehl was Telly's first main performer (well, I gues depending on how many times Telly appeared in his original form).
10. Insert something important but missing here.