You have missed quuite a lot. There are some threads on here with complete lists. Since you mentioned Terror Stars I know that you are playing TA. I'm guessing that you need to know what was added to DA as well since DL was the "original".

I'll summaraize for you as best I can:

- Race specific super abilities.
- Korath and Krynn as new races
- Anomolies that respawn
- The whole fusion generator branch of the tech tree (there were no structires in DL that added a percent bonus to a planet's production)
- Completely different espionage system
- Defending ships get to fire back even when they are destroyed on the first volley. (Except against Arcean super ability).

Thats about all off the top of my head. I never really played DL. If you have specific questions it would be easier to tell you what you want to know.

thanks guys, the thread you linked is very detailed, a bit overwhelming in fact

i've only spent about 2 hours playing the new updated galciv2, I bought both expansions, so it's TA now right?

i'm a bit unclear on the power plants. A factory just adds x amount to a planets production, but a power plant adds a % to the whole planet production? is that right?