Must remember you that this is actually a Side-Story. The most completed story takes place after these events and they are available on the Visual Novel: Muv-Luv Alternative.
What I have to say about this side story? I was expecting they could show a bit more of the true story involving the beta, theres so much things about the "Alternative Plans" and they didn't even mentioned them. This side-story is a little far from the true Muv-luv visual novel story. if you watch the visual novels you will know what I mean.
As a global fan of all Muv-Luv story I was expecting a lot lot more.....
My opinion about this anime side-story, which could make sense, is that this is maybe an introduction to a better second season where the Visual Novel takes place.
If you loved this anime I recommend you to watch its Visual Novel which I consider it the "next" season