I think this is one of the biggest blunders by the JR CVs. Simran should've been spared from character butchering because she was such an adorable mother/mother in law. I really miss the way she would look out for Roshni...how she took her happiness into account. I really miss the manner in which Simran would argue with DD over Roshni. She was fiercely loyal. Look what has become of her...
The characterisation of DD has remained constant. We know that she is stubborn & has ego issues...so her bitterness towards the Khuranas is keeping in line with her nature. Her objection to Sid & Roshni's patch up was also inevitable. But with Simran it's a different matter alltogether. She changed overnight. If CVs wanted to downgrade her to vamp status then it should've happened gradually. At least that way it could have been digested.
Watching the old episodes just reminded me of how sweet Simran used to be. Now she is just selfish & bitter.