Look at the scenario below:
3 II2 Gala contestants from Mumbai: Panna, Amay & Sagar
1 Contestant from Rajasthan: Sandeep
1 Contestant from MP: Ravi
1 Contestant from Hydrabad
So Mumbai votes were bound to be divided and since Panna & Amay sang way better then Sagar they deserve to be in top 3.
Sandeep has been getting positive remarks (Most suitable voice for playback singing) from judges and not to forget his smile can beg him most votes without any surprise to me.
Karunya though performed worse, still managed to survive because of his past performances and also he had a reason for not performing well (Gala kharaab tha "the most famous excuse").
Now Ravi who sang not any better then Sagar certainly won 1: because he begged votes from non-metro cities 2: his mantra that he is struggling in music industry from last 10 years (We Indians are very Emotional after all LOL ).
And finally I wasn't surprise to see Sagar out but I always felt that he might be in top 6 because of his beautiful Model looking personality + Average Singing. According to me he defiantly deserves to be in top 6 but not an Indian Idol ( I don't wanaa see another FG). He is just 20 and have long way to go in life and since he is a compete package for girls, I don't think he will be away from the TV or Cinema Screen for a long. So best of luck Sagar for your future, you have a long way to go.