I like it. Very nice tie in to the main campaign.
I got overwhelmed by sneaky bombers (no directives?) on my first playthrough (playing on Medium).
Some criticism/suggestions:
Cargo should have boosted hitpoints/temporary guardian, gets killed too easily by stray wingmen. Silent Threat: Reborn handled this, well (play ST:R omg).
Some enemy wings respawn instantly, which is sort of cheesy. Add a small delay, or use different wings :V: style. You've got ~16 constellation names left, you know
Shivan bombers need "kill me" directives
A fun mission in spite of these minor foibles, so far. It has good heavy assault vibes.
EDIT: Changed my mind on a few points now that I've actually finished the mission.