I've heard a lot of carping about the last episode being bad, and perhaps it was, especially as I don't think anyone really wanted it to end with the gang being sent away to prison for a year!
But if you compare the last episode of Seinfeld to the last episode of 'Ellen', or the last episode of 'Murphy Brown', which were truly awful, I think you would have to say, OK, not so great, but at least it was watchable.
I think a better way to have finished (rewrite), the last episode, would have been to make it more like the 'O.J.', verdict. Jackie could have defended them by showing that it was not their camcorder that shot the scene's of the fat man being mugged! Some how Newman could have been 'implicated', as the one making comments on the tape, and Jackies prowess as a defense attorney could have been played for some really good laughs, by having him successfully rebut a lot of the guest stars 'damning' testimony, on cross.
And then, the jury would have to find them, 'not guilty of gross indifference', due to a variety of factors, including, media coverage of the trial, bias of the jury due to improper selection, and/or improper instruction by the judge, (I forget what city they were in), racism by that cities police force, and blemished testimony by most, if not all of the characters, put on the stand.
I know the Seinfeld producer's probably wanted to close off possibilities of a Seinfeld reunion, continuation, or spin-off, by their chosen end, but I don't agree, that they had too!
Lawrence S. Tamarkin