2 Tweaks I found that greatly improved the game for me are:
**Turn on Vsync**
Edit configuration file
Go to %USERPROFILE%\My Documents\Game of Thrones\UnrealEngine3\AGOTGame\Config
Open AGOTEngine.ini with a text editor.
Find a line: UseVsync=False.
And change it to: UseVsync=True to enable Vsync.

**Adjust the Field of View**
Edit input configuration file
Go to %USERPROFILE%\My Documents\Game of Thrones\UnrealEngine3\AGOTGame\Config
Open AGOTInput.ini with a text editor.
Find the section [Engine.PlayerInput]
At the end of it, add the following lines:
Bindings=(Name="F1",Command="FOV 75",Control=False,Shift=False,Alt=False)
Bindings=(Name="F2",Command="FOV 90",Control=False,Shift=False,Alt=False)
Bindings=(Name="F3",Command="FOV 120",Control=False,Shift=False,Alt=False)
Modifiy FOV values to your preference if needed and save.
Launch a game.
While in game, press F1, F2 or F3 to change FOV.

Hope this helps as I found both work and make the game alot better.
Here's a link to a video showing the effects!
http://www.youtube.com/watch?v=aUydr_NCtyw&feature=youtu.be