I don't watch Bidaai but in SP although Saloni is dark her looks was never such a great issue. I know they stress on it when no one wanted to marry her but we know Neil had liked her and ofcourse Tara and family liked her. Only Dheer, Aditi and Kakisa found her dark looks unpleasing.
But since Sawri came into the show -her dark looks has been frown upon by her adopted father and when he tried to sell her , no one wanted to buy her. So, her being dark with fairer girls in the house would have her not being attractive as the rest and topping it her own cousin thinks she's ugly 'Eshaan'.
The SP article stated that the leap will happen when the child enters - so Saloni will get her child. Apart from the colour issue the two child are of different caste...
Sawri - dark but is NS daughter
Shweta - fair adopted and is low-caste
Sawri is going to be at a disadvantage by the colour issue but I doubt Kaveri and Dheer will ever let shweta forget she's of a low-caste.
There are other children who will/should emnate the present cast.
Subdra's child - father was a criminal as well as Gunjan is not his real father. I doubt Padma would let him forget. Would he have the personality of Gunjan?
Aditiya - Jiji's child (a Murderess child ) will he have Jiji's qualities - he is most proabably going to be spoilt
Pia's child (father a rapist and murderer) - fair but fatherless.
Nikita (Father unknown) adopted by Samar but mother was a prostitute. Kaveri is most proabably going to throw this in her face
(Nikita ans Sawri I believe will be close)
Eshaan (father is Dheer) but selfish and spoilt
Will Kaveri child survive to a leap?