I think this needs to be fixed. I understand the limits of the engine, but. that dose not mean its not possable to do something like this ->
The game render's distant objects with little detail in them (Say a tree), now if you zoom in with a gun, some times, you can see the tree detail change to high detail.
Now if you see some one off in the distance, and zoom in, the detail of the grass could then appear as if to simulate it. and make it alittle harder to see a sniper in a ghillie suit.
The Engine is more then capable of doing this because it dose it with tree details and bush details.
Thats the best I can think of without lowering the FPS to a compleat stop with +1000 grass range