Honestly, I don't like the opening. It's so...so...cheesy. It feels like the ultimate example of the show crying out, "We're still relevant!" Granted, with the series being over twenty years old, I should expect it, but it's probably due to the corny factor that I just can't stand it.
The episode is fine regardless. Lisa as a blonde was kinda weird, mostly because I never pictured the Simpsons family as blonde (and canonically, neither Homer or Marge or their parents had blonde hair). I just pictured then with funny-shaped hair. *shrugs* Good ending twist, I liked that though. Came out of nowhere, yes, but I think I can take it for the sake of comedy.