Wayne's World: Did anyone else notice this about Stacy?

Okay, fellow Wayne's World fanatics, I've seen this movie like a million times (no exaggeration) and I STILL catch new things. This time around, I was really focusing on Stacy. Like, yeah, she's the 'psycho ex-girlfriend' stereotype...but is she REALLY all that psycho? Think about it: Wayne breaks up with her RIGHT before their anniversary and then immediately starts dating Cassandra. Like, brutal! And then he's all surprised that she's a little clingy and bringing him gifts?! Dude, you messed up! Of course, the dental floss dispenser is a bit much, and the gun rack...maybe taking it too far, lol. But seriously, does anyone else think she's a little more sympathetic than she gets credit for? I mean, she does eventually move on-ish, right? Thoughts? Also, totally unrelated, but did anyone else always think that scene where Garth is playing the piano was the funniest scene ever? Still gets me every time. Excellent!