Bhishakh should have been gone long time ago – he is not a versatile singer at all – always picks the easy songs to get by. Haven’t heard him sing any classical or semi-classical song at all. The singer needs lot of training besides jumping and making sad face on the show.
I think he is there because he is the only singer left from his team and if he leaves his mentor too. So they just dragging him to keep the mentors in the show. But this is just my thoughts. i may be wrong.