I too am a little confused by Minissha. Is she or is she not a smart cookie?
I think there is a decent chance that she is still a smart cookie and can go far in BB8. I think she was the only person who understood the message from what Salman and the panelists were saying and acted on it and sided partially with the P3G gang. Partially it was BB wishes too - the Lambas and the Babbars were preselected by BB.
She lies convincingly too. Her expression doesn't change.
I think she was quick to realize what Deepshikha was telling her and correctly chose to take the high morals path when Arya was revealing all in his anger.
I think the classy, English-speaking and the sleeping on the floor even tho' she is a woman were really silly statements from her. Assuming that she is a smart cookie, the classy and English-speaking bit might have been ways to get herself ingratiated with the Diandra, Karishma, Deepshika crowd. So perhaps that can be excused. I think she mis-spoke (she thinks in English and translates into Hindi in her head) re the sleeping on the floor bit.
Also, if I want to give her the benefit of doubt, I think she chose to side with the Heroes, cos she might have thought that the winners may not get nominated. Typically, after a certain time, BB does make it such that losing team mein se hi there will be nominations. Or she might have wanted to enjoy the luxury items (in case BB was going to restrict it only to the winning team).
I wonder how she is going to utilize what Punz is saying against her. If she's smart, she will milk it and yet get in with the P3G crowd.
There's a good chance that Punz, Arya and Minissha colluded with each other before BB8 started and amongst themselves they may have a plan for each other. Let's see..