My take on a game review is that graphics should never factor into a reviewers score unless they take away from the gameplay experience. If the graphics accomplish what they set out to accomplish, then they serve thier purpose.
Take for example, chess.. if you built the perfect chess game, perfect AI, great match system, and great learning modes, and you published it with nice looking pieces, someone would say be todays standards the game would only be able to achieve an 8 cause the pawns do not walk on the board.
If your chess game came shipped with only a smurf piece set, then it may deserve a lower score.
And to lower a score because of a games system requirements is wrong as well. Sorry, games do not need to be designed for low end systems. I have a low end system (outside my graphics and sound cards). The key is does the game run on the required system.
There doesnt have to be a graphics vs requirement tradeoff. We are not grading the programmers on their ability to compress code and make the game run on a low end system.
What reviews should be based on is gameplay, and that should be really based on how would someone who loves the genre like this game.
When I wrote my reviews (a long time ago), I would always start out with every game being a 10. When something distracted from a game, I would subtract appropriately.
Anyhow, I really do think NWN2 deserves around a 9.5. It really is a great game, and one that everyone will be playing for years. Oblivion will be collecting dust (or whatever games collect when stored on your drive) while NWN2 will still be played 3 years from now.
And for the record, I may be the only one, but I think NWN2s graphics are pretty good. I like the look of the game.