Yup, I'm satisfied with the ending. I've loved the show since the very first ep, and stuck with it through that 4-episode summer special.
I was watching this with a group, and some of them just didn't like it at all. I can understand why... I mean honestly, NBC hyped the hell out of this episode. Perhaps they wanted to give people the impression that this would be Newhart and Cheers ... COMBINED! I can see where some casual Seinfeld fans might be turned off. "That's it?"
Instead, we get what we have. I think it was good. There have been many, many comments over the years about how insensitive these characters have been, mostly from non-fans, and now the tables have turned. Sort of. The ending shows that these characters probably won't grow in that year's time. They never will. They've always been insensitive, selfish kids...
...but that's what's so great about them! This was ultimately a dose of revenge and "the real world" gaining on the guys.
If this was a typical sitcom, we would have seen the characters sharing a cup of coffee at Monk's, or hanging out at Jerry's place, as usual. But come on. This is Seinfeld. This is not a typical sitcom, and never has been. Why put a typical ending on it?
No, it's no Newhart, but that went for the laughs. This went for something else - closure - and succeeded.
Paul