In 2012, the commission was investigating alternative court processes but was asked to stop by then minister Judith Collins.
It suggested judges have more control in criminal trials, to ensure they were fairer and less confrontational for victims and witnesses.
Ms Nicholas said if changes were made, there would likely be an increase in people coming forward. "They will feel safer going through the process."
She said the Roast Busters case might have been a catalyst for the announcement.
"But Amy Adams had said prior to that, conviction rates are very low, 99 per cent [of defendants] get acquitted ... that's because of the aggressive nature of having your character as a person and victim stripped."
She said she'd like to see judge-alone trials and more control over defence lawyers' behaviour.
Ms Nicholas also spoke about her experience at Masterton Town Hall last night.
She said White Ribbon Day was talking about all types of violence against women and girls but she added it also happened to men.