Sort of. What she sees as a problem is when people think something is "over and done with" and can't be fixed, or can't be changed. Also, the idea that the way things are right now (her summer friends and love affair) might come to an end, is also something she identifies as a problem.
Hmm. Maybe the Crucial Element is more like, believing that one's (place in) life is not a foregone conclusion. That ties in really nicely to her whole throughline and the OS. And it's something she believes strongly about both herself and others, and what makes her stand out from the rest of the cast.
Keep focusing on how your life is not a foregone conclusion, and you can get everyone to relax their class prejudices and enjoy themselves.
The hilarious thing is, there's another gist for Ending "seeking a grand finale" that is perfect for what actually happens in the film. Although not as meaningful as above, it still fits nicely:
Keep focusing on that climactic final lift, and you can get everyone to relax their class prejudices and enjoy themselves.
Any guesses as to the movie yet?
(I'm not 100% sure on the storyform so might start a new thread on it...)