It seems to me like Juno leaves partway through her interrogation--that Simon was going to say more than
"I really shouldn't be telling you this", and even so, she just leaves.
I'm afraid I don't have a whole lot to say either. I enjoyed the glimpse at the magic system and think von Bredow's chapter particularly has set up a ton of great conflict.
I don't think that things are moving too fast. Of course, I suspect I'd feel differently if we were only getting von Bredow's chapters, and I may feel differently next submission when (presumably) they get around to actually commencing the attack. Though you're dropping us right into the conflict here, I think it's working for me because even up to the mutiny, it's isolated to characters that we've seen before, even if we haven't spent much time with these guys. An attack on the Terrans, on the other hand, will throw us into a much larger conflict that we know nothing about, not even who to root for.
So yes, there is that possiblity. For the moment though, I think it's fine.