Considering that in the original Macross singing literally saved humanity from destruction I doubt that it is not going to play some major role in this series as well. I think singing is to the Macross franchise what giant space colonies or discovering that the side you were fighting for during the first half of the series isn't as sweet and noble as you thought are to the Gundam franchise.

Just look at the scene around 19:15-19:35, Sheryl and Ranka's song managed to instantaneously travel across several light years so that Alto could hear it through an earring, and then it had a paralyzing affect on the alien attacking him allowing him to kill it and save Luca.