That's a good question.
It's important to understand that it's not the commission that ultimately decides. It has the power to send the case back to the courts. If the threshold is too low, it will probably send more cases back. Before the courts, however, the applicable standard remains reasonable doubt. The Crown must prove guilt beyond a reasonable doubt.
Would there be more acquittals or fewer acquittals? That remains to be seen. The final decision rests with the courts.