As far as the moral goes, Rarity was never called out after lying to everypony in Canterlot
and her friends. Her main lie was revealed, certainly, but nobody really minded. I was also a little disappointed when what I saw as a fantastic plant and payoff segment when Rarity lied about Rainbow Dash's job to impress high society didn't quite payoff as it was never brought up again. That seemed like a good opportunity for at least one joke.
But I was pleasantly surprised when Fancy Pants turned out to be both understanding and genuinely polite towards Rarity when the truth was discovered. Fancy Pants, you are a bro. I mean, just
look at him, he's so posh and amazing.