Personally I think Pfestivus just needs to be whatever it is, and you can't overthink it. Does it turn into a love-in for a bunch of people who've met in person? Sure, maybe. Or a surreal poetry experience for some? I guess so. But what happens at Pfestivus will just happen and it will be different for different people every year and you can't try to fix that or make it be a specific kind of experience for everyone. It's just an annual event at which people let loose, and depending on what everyone's year has been like, the kinds of feelings they'll need to unleash will be different. It's a good chance for otherwise buttoned-down PFCers to haze newbs or post drunk; it's a time when new posters might reveal some human quirk that endears them to long-time contributors.
No need to make it be a specific thing. It's a moment when things get slightly out of control; why try to control it? Celebrate the chaos. Have another beer/whiskey/huff of glue and just check out the action.
At least, that's my philosophy, as a guy who's spent most of the year so far gluing bits of wood together.