Instead of showing rift b/w the two sisters, it would nice if that they show their bond strengthening even more.
Seeing the love of these sisters and the love that they give Dadi Bua, they should show that whatever Dadi Bua went thru the pain that is still there is lessening, Vasu sees herself and Ambika in these 2 sisters, realizes her mistakes, makes ammends.
The relationship b/w Dadi Bua and Vasu improves. Ambika Satyan return home, Vasu / Ambika relationship improves.
Instead of showing that the negative forces are affecting Sadi and Ragi they should show that positiveness and the love in these sisters conquers all negative forces around them. (This may be the ultimate result even if they show the rift but it can be achieved even without the rift).
This would then be conveying the real essence of Bidaai and the love of sister that was shown when the serial started.