I travelled to Nepal via Delhi in 2015. Like everyone, i was skleptical about the route and heard many bad experiences from previous traveller. Also, I tried my best to avoid that route but I booked the flight last minute due to cancellation of my previous flight. Long story short, i had the best experience ever, the flight steward moved us to the front seat, provided us with bassinet, took turn to bring us food so we could take turn to wathc our kid and packed some snacks for our 5 hour transit(this was a first for us) at the airport.
The airport was little warm, i think the AC wasn't working properly. Other than that I didn't have any problems. Safe travels to you.

Disclaimer: it is just based on my expereince so, it might be diffrent from someone's else.