I agree that the 1992 credits theme is now somewhat outdated. And I know that when they changed the opening sequence and theme music in 1998 (they did a classic-style intro with Big Bird and the kids playing in Central Park) and added "Elmo's World", they kept using the same 1992 closing, but it seemed to work better that way, IMO. I saw a 2000 episode from PBS Kids Sprout On Demand, and it had the 1992 closing, but they faded right to black right before the CTW info came up. They just faded to the Sesame Workshop copyright and Big Bird saying "Toodle-oo!" But at least in current years they show the ending part with the Statue of Liberty and the tugboat sailing off. However, if they DO make a new closing credits theme, then they could use the old 1969 closing theme (they still play a portion of it after the "Trash Gordon" segment before the credits roll). But a new opening would be pretty cool.
BTW, the reason why I called the 1992 calypso opening a "drastic" change was because it was all too sudden, and people were familiar with the classic theme. The animated elments during the 1992-1998 opening were also pretty stupid (the monkey on the vine, the fake "static," the blue bird at the end), and having more Muppets was an OK idea, but it was sometimes overkill. However, I DO like the part in the 2002 opening with Super Grover holding up the episode number sign. It's sort of a throwback to the animated episode number sequences on the older episodes. Maybe they could do something similar like that.
Anyways, I've noticed they've been using too many cartoon sound effects in recent episodes during the street scenes for a "comical" feel, mostly the sound effects from "Looney Tunes" and "The Flintstones" are used with them. They fit fine for the animations, but the Muppet segments and the street scenes always used to have these cool, funky sound effects that were quite similar to the sound FX in the early "Gumby" cartoons, such as Sam the Robot's mechanical sounds, the "boiiing!" when Harvey Kneeslapper would slap a letter or number on his victim, and more.