It lacks dimension and texture, it gives the appearance that it is a smooth surface. It may be done on purpose for processing for all I know. It stands out even more now because the grass has texture now. I know they show particle effects when running and sliding but the particles are too big to be believable. It does not bother me at all but I know it is not 100% correct either. If this was a game where all we did was stare at the dirt I could see it as an issue but when the game is moving that is the last thing that will be on people's minds.