No, seriously. He's frustrated that he can only fly so high (within the ship, in his Ex-Gear). There is some statement about the possibility of Alto joining the military (I am assuming NUNS) once he has graduated. Also, he *can* fly a civilian plane now, but that doesn't seem all that exciting to him.
I don't see his plans "falling through". That is, unless you are talking about their performance at the concert, which he didn't seemed to thrilled to do to begin with. All of that is secondary to his dream of flying Valkyries.