Not sure if its because I'm accustomed to AI War.
I'm trying to put myself in the shoes of someone who does not own the game. I was waiting for a moment when I felt "Wow, thats epic!". Don't think I felt that.
The whole AI getting angry thing was a few starships that came though. They got pummeled on by a million missiles, yet seem to take no damage (to the casual observer, your target audience). A few ships came through, were fired at a ton, but just sat there and continued attacking.. I was expecting a thousand mad AI ships to come pouring out of the system and start spreading all over.
Maybe it was the music. Maybe I would have been happier with something like the ending theme from Saw
However, just as important as my opinion is how you feel about it (you being developers, forum frequenters, etc).
That being said...your game is my #1 fav for almost the past year! Wow, its been sooo long.