I can't really think of a reason why the quality of the justice would be impacted by the decision to proceed either summarily or by indictment.
When the Crown proceeds by indictment there are implications for that in terms of the accused elections. If the Crown intends to seek a lesser sentence and doesn't see a value in the more cumbersome procedures of a preliminary inquiry—should they be retained after this bill—or a jury trial, that could be a consideration that the Crown makes as well.
I'm not sure that there's a benefit other than perhaps the fact that matters in provincial court do tend to take a little bit less time from charge to completion.