I think once Bagga goes, in all possibilities, Sana may switch sides to Vishal and Asim. She seems to gel better with guys than her own gender.
Sid has directly commented that once you are out of the house, which means he expects Aarti to be in end. Is he aware of some information that Abdullah is going to remain in the house bcos of Nepotism and he has to support her.
Shehnaz is smart, can pick up clues. She looks genuinely fed up with everything.
By all means wanted Mahira to go as dynamics can change by default but Sana also is going to do something major.