I'll have to disagree with ssetta's opinion on the matter. Sure, we'd all like it if there were more than 26 episodes in the new season, but it seems to me that the quality of those 26 is every bit as good as that of the hundred-some-odd that were produced each year when I was a kid. The newer characters interact well with the older ones, and most are successful enough even on their own terms (I defy anyone to say that Zoe is less interesting than Prairie Dawn).
To me, this "Sesame Street is going downhill and it's all the new characters' fault" stuff is roughly comparable to a "Peanuts" fan, circa 1973, complaining about how Peppermint Patty and Marcie were ruining the strip and how Shermy, Violet, and the other Patty were infinitely more interesting. As far as I know, that didn't happen. (Of course, the fact that Schulz wrote and drew the comic for the entire length of its run didn't hurt). Even Rerun became a good addition one he was given the chance to develop, and the same is true of the Sesame characters.