My own speculations:
What if the "Hovering Sojourn" is about the Chosen One who infiltrates a NOMAC and uses it to broadcast his own stirring, forbidden melody? Just like a loudspeaker. That would be his Hovering Sojourn. After all, the NOMACs are huge, there might be some room within their structure. This would also explain the Majesty-shaped chassis, since the NOMACs are'n going to be a negative force forever, they will be hacked by Ravenskill and used against the Empire. This might also explain why the NOMAC is so important and such a recurrent theme: because it's going to play a main role in the story.
"Brother can you hear me" might be a first attempt to communicate via the NOMAC. Obviously, the first person he will try to get in touch with is most likely his brother.
"A life left behind", may just speak for itself. He's on a mission now, and will leave his life behind.
"Ravenskill" and "The Chosen": well, isn't he meant to be the Chosen of this faction? Maybe these tracks will tell us about the faction and about our hero; it may be his past or something about the character in general.
"A Tempting Offer" Let's assume we're getting close to the end of first disk: it's about time for a nice plot twist. The Empire tries to negotiate with him, to corrupt him in order to prevent him from destroying the whole system. Will they try to deceive him? To tell him lies to take him on their side? Or maybe some kind of confession (with some truth in it), to try and destabilize him?
"Digital Discord" might represent the uncertain end of the first disk, to make you eager to know how the story will develop in the future. Strange, disharmonic sounds that spring from him as he fights with himself while seeing things under a new light.