There are few shows as incendiary as Family Guy is these days. You either love it or you vehemently hate it. For those like myself who found themselves still enjoying the series as it progressed, despite all the claims of chicanery and laziness in the writing department, this was a Godsend. One of the main themes running through out the later seasons of this show is the abuse of the character of Meg by all of the other characters (and writers), and in this episode the writers finally confront that issue head-on.
By having Meg stand up for herself and then psychoanalyze all the members of her family, the writers on this show are giving the viewer the subtle "wink and nod", letting the fans know that they are aware that they've relied on the Meg-heavy jokes for far too long, but much like Meg enables her family in this episode so they can stay together, the writers are enabling "us", the viewers by presenting their show each week full off random cut-off gags, and how that's not such a bad thing after all. Sometimes you just want to laugh at funny images and situations, regardless of how the characters got there
What's so great about this episode is that they're able to fit all of that metaphysical stuff into the main storyline revolving around Meg in and still be able to deliver a B-plotline that shows us the hilarious escapades of Stewie and Brian when Brian decides to eat psilocybin mushrooms to kill time during the storm, and some of the funniest moments in the episode are between Brian and Stewie.
All in all, this was a phenomenal episode that is far deeper than your typical average television viewer might think it is, it was full of laughs, it had a clear and concise message, and it delivered it fervently. An outstanding way to continue opening the new season.