I think the songs that the contestants are selecting (or are asked to sing) do not offer them much opportunity to show their real potential. For last several rounds the songs contestants are singing are from the newer movies where rhythm plays bigger roles than the melody and the words. They do not really challenge the contestants. Remember Sharib and Ujjani mostly went unnoticed until they sang Lagi Tumse Man Ki Lagan and Mausam ki Adalabadali Mein? I think it will be worthwhile for SRGMP to have one round of classical songs where the contestants will really be put to the test and those who are really well trained, have perfect control over sur and have melody in their voice will get an opportunity to display their full potential.
If SRGMP really decides to go for a classical songs round, here are some great classical songs that will help the best singers really distinguish themselves from the rest---
song/singer/movie/music director/raag
Kuhu Kuku Bole Koyaliya -- Lata/Suvarna Sundari/Adi Narayan Rao/ Sohoni
Naino Mein Badara Chhaye -- Lata/Mera Saya/Madan Mohan/Bhup
Jiya Le Gayo Ji Mora Savariya -- Lata/Anapadh/Madan Mohan/Yaman
Chota Saa Baalama Ankhiyan Neend Udaye Le Gayo-- Asha/Raagini/OP Nayyar/Tilang
Kali Ghata Chhaye Mora Jiya Ghabarae - Asha/Sujata/SD Burman/Pilu
Na Jiya Lage Na, Tere Bina Mera Kahi Jiya Lage Na -- Lata/Anand/Salil Chaudhary/Malgunji
Jao Re Jogi Tum Jao Re - Lata/Amrapali/Shankar Jaikishan/Bhoop
Laga Chunari Mein Daag -- Manna Dey/Dil Hi To Hai/Roshan/Bhairavi
Madhuban Mein Radhika Nache Re - Rafi/Kohinoor/Naushad/Hameer
Puchho Na Kaise Maine Rain Bitayi - Manna Dey/Meri Surat Teri Aankhen/SD Burman/Ahir Bhairav
Jhanak Jhanak Tori Baje Payeliya - Manna Dey/Mere Huzoor/Shankar Jaikishan/Darbari Kanada
Nache Man Mora Magan Tikta Dhigi Dhigi -- Rafi/Meri Surat Teri Aankhen/SD Burman/Bhairavi
Koi Sagar Dilko Bahalata nahin - Rafi/Dil Diya Dard Liya/Naushad/Kalavati
I think only Nihira and Sharib can do full justice to these songs. Others will struggle with their breath. I would love to hear Nihira singing one or more of these songs in the rest of the rounds. If she does, then nobody will ever question her superiority over others.
But alas! with costume, make-up and performance coming ahead of everything, these kinds of songs will hardly find a place in this contest....