Yeah, I did like how they always alluded to the ridiculousness of the show. That's why I always liked it, hell. I know from listening to the commentaries that it's pretty stressful doing it week-in and week-out, but it would just be too sudden of a departure to feel comfortable with. If it's the end, finish out these last 7 weeks in an epic way... thank the fans for 15 years? lol
I'm not so sure. One of the opinions I've heard around the 'net is that they'll use the last 7 episodes as actual storylines, all correlating to one another, and really ultimately shake up the fabric of South Park. The episode description said something similar about "Stan seeing SP, yadda yadda, change the fabric, etc." But basically, insinuating that these would send of the show in "proper" fashion. Although it's been more of a sitcom than anything, technically, there has been significant character development and it'd be nice to see it through.
I guess we'll find out soon enough.