I don't have a specific change log in front of me but I can tell you a few of the things that went into v2.01 over 2.0.
First, the AI is better. I made changes to how the AI decides which planets to colonize and improved how they pick their research projects. The overall "Feel" of 2.01 in terms of pacing and general fun is just much improved really in my opinion.
Second, the team fixed some crashes that we had noticed. I'm not sure what caused them but I know that they're gone now. We're not sure how they crept in there but it was certainly something that got introduced in v2.0.
Another cool feature is really a set of changes to research costs and tourism that just make the game feel a bit better. It's hard to really define but long time players I think will appreciate the general maturing of the play balance.
Lastly,I updated more of the game images to get rid of older images. I'll bee doing this more and more as I play so expect a v2.02 at some point in the near future. I play at very high resolution so when I see a low resolution planetary improvement, it drives me crazy.
Here are some screenshots:
Now, as part of my job, I have to play-test these games for hours and hours at a time. It's a true sacrifice. What can I say, I'm a real hero.
This is truly why things like Twilight of the Arnor and v2.0 are so important. You really can future-proof a game by just enhancing the graphics and such without having to rewrite the entire game.
I never get tired of that.
I read on-line how some people don't even look at the battles. I must say, even after 2 years since the original release of GalCiv II, I still watch them.