Here is my reasoning for her elimination:
Sara - not much support from Pakistan and Indians have so many to chose from and really most of us vote on regional basis
Zaheer - Getting majority of votes from Pakistan and does have some fan base in India as well
Asma - Is she really getting any votes?, I don't think if people from Oman would care to vote mostly she is getting some sympathy votes.
Soumen/Debo - They are splitting votes from Bengal (still enough votes to keep them alive).
Prathiba - Huge fan base in Punjab.
Yashita - Come on folks Bombay is a big city and she is getting majority of her votes from Bombay and the area
Vaishali - Marathi and lots of sympathy votes.
I am not arguing who is better and who should win, I am simply trying to give you the analysis of the distribution of votes, off course they are also going to get votes on their talent but majority will come from their own region.