Here's some thoughts. Good work putting together a mission. You have shown your ability to work with FRED and think through the needs of getting a mission working. Now you just need to tweak, bugfix, balance it.
First of all, you have your cap ships (at least the Tyre) moving like fighters with huge maneuvers. You should consider working with waypoints and the beam and turret control sexps instead of ai-attack orders.
Second, the Glory was killed during the battle, but nothing in the mission acknowledged that. In fact, at the end, the Glory was told to hold position! Of course the debrief congratulated me and also suspended me from action because of this.
Finally, the Return To Base objective marked true before I pressed Alt-J. Usually this one only becomes true once Alpha 1 has departed. It seemed like in this mission it became true after a message was sent.