Flew Delta to Rome and back this September. No charge for headphones in coach. The cabin attendants were great -- I'd broken my foot while biking in Sardinia and they cleaed out a 3 seat section for me (on a very full flight), so that I could keep the foot elevated -- made all the difference in the world on a 10 hour flight.
They offered fluids and snacks and meals constantly -- a meal and a substantial snack on each flight, as much bottled water as you wanted, and multiple snack/soft drink offerings. The food was not bad for airline food.
Leave jackets/sweaters accessible for the kids. For some reason, overseas flights tend to run cold.
Delta, like several other major airlines, is in bankruptcy proceedings, but it is not expected to affect day to day operations.