I didn't have any jaggies at all hardly playing BF4, but that is because I was using 4x MSAA I guess.
The 1.5% 0% combo didn't look bad to me at all. I could definitely see a bit more detail in my rifles though, but then again that could be because I was using AA in game.
I guess I could scale it higher and then cut AA off and set smoothness to 10% and see what that does since I still have performance to spare.