I can say without any reasonable doubt that people will be modding away like crazy once those tools are released. Theres many areas that can be improved upon or changed abit. For example, the lack of blood, dismemberment, new battles/map (Stalingrad anyone ?) Mods - improve upon games in the vein of Counterstrike.... change sprites, sounds, explosions, whatever.... the list is and can be quite exstensive....
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Blessed be the Lord my strength, which teacheth my hands to War and my fingers to fight.