There is very little to say about Seasons 8-9 that I have not already said. The show is still the funniest thing ever on television, but compared to the older ones? There's no competition.
Frank stole the show with his war flashbacks, his insulting of Estelle's cooking and his behavior in the final scene. How Jerry Stiller did not get an Emmy for this performance shows that the awards really mean nothing in the grand scheme of things.
Not the best episode of Season 8 by any stretch, but consistently funny, and worth your viewing time if you are thinking of watching it.