Unless Splash Damage officially tells us what and/or who decided to change things, it’s all just speculation.
For instance, beta testers (hired ones) have a lot of influence on the development with games. Container City looks much, MUCH more darker in the video(s). It’s possible testers complained about this.
My buddy said he thought he heard something long ago about them having to scrap the graphics and hurry it up.
Also possible. Both Container City and Terminal looked way more detailed and moody in the early (2009) videos. Perhaps the designers put too much time and effort in these maps, that it’d become unrealistic to reach a deadline to give the other 6 maps just as much details. And thus instead of releasing a game with 2 beautiful and 6 ‘less’ beautiful maps, they balanced the visuals of Container City and Terminal. Who knows.
There are soooo many things I liked about the Container City and Terminal videos, that didn’t make it in the final release of the game. They both have great, stunning dark shadows, giving the maps a great atmosphere. The contrast and colors in Contaienr City resulted in what could possible be the most amazing ‘evening’ visuals ever. The spotlight in Container City near the gate. The (more obvious) presence of light-rays in Terminal. The in-game cut scenes.
The only thing I don’t prefer are the interfaces. They looked unnecessarily busy and complex in the videos.
I doubt we’ll ever get to play BRINK of 2009 though. But I still wish we could.