Precap shows the attack on Rajjo so I don't think it's fake. And the article didn't mention that Rajjo will accuse Raghav. I'm in the minority but never felt Rajoo is negative and nothing has happened to change my feeling.
The way the article mentioned Chakor suspecting Raghav makes me feel it'll be for a short period and then she'll trust him. All these problems are to build trust between Chakor and Raghav, problems make relationships grow.
About mamaji's death, the article may be wrong, lately their articles haven't been 100% accurate.
This twist isn't to give sympathy to Rajjo, it's to reveal the villain to Chakor and grow her relationship with Raghav.
One thing is clear, makers want Raghav to stay for as long as possible, they don't want to rush his story with Chakor.