As storyeller said, it's not just the particular flaws, but the execution. Apple Family Reunion may have worked in potential, but because neither her or the other Apples take the conflict to high enough level it feels too mundane, and like the plot would have worked better with another character in her place.
It's like say the comparison between
Duck Amuck and
Rabbit Rampage. The defining humor of the formula for each is the neuroses and tantrums that the character vents at being abused by the animator, something obviously Bugs could do a lot less than Daffy, and since they put no unique form of reaction in it's place, RR just felt like a copy of DA, only watered down. The same, but less.
A Js other flaws, while maybe not the ones primarily on display, could have helped elevate her shortcomings in that episode, her overzeal being exacerbated by her more aggressive and hyperactive temperament from early episodes, compared to later on where she is just too calm to start anything.
edited 31st Dec '12 10:40:32 AM by Psi001