I guess they've forgotton about it... not only the plant truth, but ASR need to know alot of things which I think will never come out.
1) SHyam met Kushi becasue ASR publicised the clip from the show. The goons would not have attacked KKG and her family had that clip not come up and shyam would never have laid his eyes on her.
So everything KKG had to go through becasue of Shyam is ulimately due to ASR's actions.
2) he needs to know about maami tearing the saris KKg brought and hence made KKg loose face infront of his family.
3) he needs to know maami put lime juice to make her sweets sour in Anjali's anivesery party which cause a huge lose to KKG and also embarassed her nfront of the family.
He needs to know what Kushi went through at the hands of him and his family.
But I don't think any of these will come out. After all the female lead has to suffer in silence right? Thats how it all works with TRPs