We already know how FXAA use tends to blur textures in games while simultaneously serving as a quick method of AA. However, it seems as though FXAA use in Battlefield 4 blurs textures more noticeably than in any other game.

HardOCP suggest turning the "Antialiasing Post" setting to "Off" in order to fix the blurred texture issue. The other AA settings in the game should be ok to adjust to your own tastes, just leave Antialiasing Post "off."