Quite an interesting take. There are many perspectives you can take from Jeevika's stand and I think that's why the sisters relationship is more debated. With the brothers, it's a straight-forward, easy going relationship where both will be there for each other and there's hardly ever any disagreement. Where as the sisters, their whole emotional attachment towards each other is so unstable that you don't know what will trigger what kind of reaction. The reason why the brothers are in sync is because it's not their relationship which drives the show forward. You need the problems and conflicts for the drama which mainly comes from the sisters so there will be instances where J & M will upset each other and seem to not understand each other but frankly it's a part of their relationship. It's full of emotional upheaval .If they were like the brothers, all 'normal' (which I know some people appreciate more) then there would be no story to tell.