Just finished this up.
Having only played the first game, I really liked the rest of the anime. There was clearly a lot rushed and left unexplained. The final fights were horrible, but the lead-up to it was fantastic.

I have a hard time imaging how they go from a multi-arc/no true-end first game to the followup, so I certainly understand why they did what they did with the first season. It probably would have gone over a lot better with a few more episodes, though.

Sniper Makina, Combat Sachi, Useless Michiru, and Genius Kazuki all the way. Screw the rest of the girls.