The new nanny opened up a traditional side of Ross which has been hinted at before ("Whatever, dude, you kissed a guy") but never taken to such extremes. Even Joey accepted the nanny; the joke there was not quite that it questioned Joey's masculinity but that it questioned his adulthood. And did anyone notice that the problem was discussed intelligently by Ross and Rachel but not resolved in the end, even with an extra 17 minutes allocated to the episode? Maybe conflict resolution is a thing of the past, only present in outdated family comedies.
In case that wasn't enough to convince you, how about when Mike catches Phoebe cheating on him? He accepted her apology quicker than anyone I know would have in his situation. Yes, I still watch the show every week, and it continues to entertain, but realistic plots and characters make the difference between shows I like and shows I love.