Actually the kids are not all similarly over smart, I come from a biggish family and I think what they are showing is quite realistic.
The parents are a good mix, Sweetie extra strict, Lucky relaxed and happy to leave the discipline to his wife, Jeet thoughtful and sensible, Pinky trying to be a cool Mum but a bit paranoid.
Most of us have parents or aunts and uncles who fall in one of these categories, isn't it?
Among the kids, Raavi is not over smart at all, she is very much a mama's girl, the good girl who keeps to her studies. The Abhishek thing was not started by her, and it was blown out of proportion by her family, so after that she reacted by being rude to everyone, but she also apologized. And come on, in which school don't they have silly boy-girl affairs at that age? If they are showing teenagers, they have to show these things including the parents' worry about it. Her later actions regarding Ginny when she confesses to her Mum shows her mature side.
Ginny and Rocky are typical of a family where the parents are strict. I had a couple of cousins who were locked in their room during neighbourhood filmy concerts because my uncle thought film songs are the path to hell. Well they used to escape through the window to go dance at the concerts. When they got caught I remember my Mum saying instead of locking them up it would be better to let them occasionally go to a concert with a chaperone. So Ginny's rock chick avatar is partly based on rebellion, it makes sense. The song sequence was not great, they could have toned it down a little, but her character is quite normal for her background and age.
Raashi is a nani-amma, which many younger sisters become, due to extra indulgence from the parents. Again, something I can relate to, having seen in my family. Sunny is the cute kid.
See if you think about parenthood, the really difficult part of it is when the children become teenagers and rebel. Small kids take up a lot of time, but decision-making isn't as hard with them. So showing a bunch of teenagers with their hormone-driven issues, and parents trying to deal with them is quite real and interesting to me.