If a decision hasn't been made on the scoring system for the knockout rounds, I'd like to suggest we use the scoring we had in the last World Cup. Basically, scoring is the same as we're doing, but if the game goes to extra time, we use the final result, not just the result after 90 minutes, and if we predict a draw, we get to predict the penalty kick winner with it for a chance at a bonus point.
The bonus point possibility on draws is fair because draws are less likely now, since the draw has to hold up in extra time.