I know what you mean about the fluid feel of Quake 3, Quake engines or engines like Torque. The game has that klunky Unreal movement feel. The maps are nice for outdoors. You really have to focus on learning a class to appreciate the game. Its not bad but needs some tweaks.
I guess the question is, do you really want a realistic war multiplayer game (which is not ET:QW) or do you want a fun game thats not slow as hell but still requires teamwork to get the win. Personally I wouldn't want an ultra realistic war game, that would be a bit boring.