This topic was already posted 2 days ago - you'd have found it on pg 2.
But I agree w/ your analysis - KK & Dadi were opposed to this match only b'cos CM was as well, and they didn't want Sudha, like Jyoti, to be ill treated by her. Otherwise, KK was always in favor of Sudha being dated by Uday, and during that time, he had no idea of what CM thought about Jyoti.
Padma - you hit the nail right on the head. Had Uday been in love w/ Sushma instead of Sudha, Padma would have been all for it - he's rich, not blind, a genuinely decent guy, and she'd be thrilled by such a match. But unlike Sushma, who was w/ that loser Brij for so long, Sudha, who Padma perceives as a loser, has landed a guy that even surpasses Pankaj in terms of his abilities and decency. No wonder Padma is jealous.
I however thought that KK's & Dadi's parting comments last night were uncalled for as well - they could have just given Sudha the silent treatment and left. After all, this is the same Dadi that used to hit Sudha on suspicion of eating her laddoos and cream: now that Sudha isn't there anymore to have any of her stuff.
Even Jyoti let down Sudha in the past when she walked out of the house w/o Sudha. Only 1 person has ever cared for Sudha, and that's Uday. It's understandable that had Uday gone ahead w/ that contrived marriage, Sudha wouldn't have survived long - she could only have become Devika so many times before that would come in conflict w/ her medication, and then all her escape routes would be cut off. After that, she'd probably have had a brain haemorrage. All for the sake of the 'izzat' of the Sharmas & the Vashisths.