Robotech and mature storylines? Sorry. I watched Macross a few years ago and I didn't come across any such lines. A lot of Miss World election-style "war is evil" fluff, some "pacifists are assholes" nonsense, and a mandatory love triangle side story with a fighter ace hero who beats up the girl he rejects in the end and tells her: "You do what I say, bitch!" About as mature as Prime.