I know how Erdogan changed after shooting down the Russian plane. Turkey is changing and Turkey will change a lot of policies that it practiced before. If he came all the way to meet Modi then he must have come with some offer. Diplomacy is always about give and take. Only time will tell what he gave and what he got.If I know Erdoğan well, I do, this is the simpliest explanation of the trip;
Main agenda; FETO schools in India.
Subagendas; Kashmir issue, bileteral trade bla bla bla...
Erdoğan is pro-Pakistan on Kashmir and it won't change. Maybe he can say something pleasure for Indians to hear untill he gets what he wants. So there is no need to discuss about NSG, SC and other stuff unless Kashmir issue is solved. No back from Turkey for India.