To me the line play is too chaotic to quantify who did what. The desired result is that the offensive player is stopped before he gains more than 3 yards, or the QB was pressured or sacked.
Who gets credit for funneling the ball carrier to certain direction, so that the tackler makes the tackle? It could be multiple players that do that.
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Seems to me you can kinda tell if the Dline player will be out of position within the first three steps he makes on the play. Sometimes he doesn't take any step at all.
I hope Mazi Smith is improving, but I lost interest in him few games back.