It seems the engine is intertwined for the blocking and running algorithims for the rushing game , yards after the catch and both kick and punt return.
I like where none of them are at right now. Rushing has blocks held too long, YAC has been nerfed, and kick returns blocks are held entirely too long and punt returns broken tackles are as frequent as WRs on receiving plays.
Still, all that said the game is the most balanced it's every been. But I don't like where any of these stats are at .....except the end result.....they are the best we've had in a long time.