Three, or make that two, cheers for Kay Sahagian! for raising the level of our TV viewing to the level of the show in question -- beyond simple loved-it, hated-it effusion.
I watched the "Yadda yadda" episode without having been subjected to the promos, and independently thought it one of the best ever (comparable to "The Pick").
Sahagian makes some good points, however, about the cartoon-ization of the characters -- something I also regret. True, having the Phil Rizzuto Pez, in a recent episode, saying "Holy Cow" while spewing skyward is a bit over-the-top. We don't need to see a charred Newman at the end, either. But what I remember most about that episode was how Kramer held his pictures of the baby highway lane, and even more, the construction worker's mocking "yeah... pshuh, it's about money." In the "Yadda yadda" episode, they didn't have to go through with the wedding (though I loved having Robert Wagner there), Elaine's deal with the adoption worker, etc. I think the producers add these kind of obvious bits to broaden the appeal.
Happily, for the time being, they haven't removed the wit in the process -- e.g., "give me a shtickl of fluoride, will ya?" and Jerry's proper objection as_a_comedian! However, the integrity of the show is weakened in the process. I reminds me of how "Married... with Children" lost all of its bite. Before we knew it, Al was bartering smelly socks with aliens. I love "Seinfeld" but think that just one more season will suffice -- then it can retire proudly as the best series ever.
I disagree flatly about the inter-relatedness of the plots; they were thematically tied.
Sahagian over-reacts to her critics, though, and invokes the Nazi salute. This is the kind of flamboyant gesture she would rightly criticize. Her plain text arguments are more powerful than the use of an unfortunately diluted slogan.