Nothing to write home about, but worth the trip.
Graphics - I honestly couldn't tell the difference between this game and the original. But what I could tell is the difference in how it was coded. Dear god, with all the crashing and patching I felt like I was playing a game of "see how long you can play without a buzz kill." It got to the point that hitting F5 was as much a part of the controls as the game was. Save early and save often with this one...
Gameplay - COH OF didnt dissapoint with its style of RTS gameplay. I didnt see much need for improvement either, but where it was needed, I saw the minor tweaks addressed. I still dont get the lack of ability to map the keyboard the way that I want it...maybe I missed something but that has always seemed to be a major flaw of this series. The new campaigns were well done and well balanced. They did a nice job of introducing new weapons and tactics while keeping it as realistic as possible.
Storyline - They did a nice job of telling a story. Its tough to make any war genre interesting considering they have all been done, but the storyline was well done.
I wouldnt go out of my way to get this game unless you are a fan of the series. It may be worth checking out when the new game releases start to slow down a bit.