Judicial discretion in sentencing is not fettered by the length of available sentence or by whether it is a summary conviction offence or an indictable offence. It's fettered by the maximum punishment. What I'm clumsily trying to say here is that I don't think how you classify the offence has an effect on the length of the sentence, except with respect to the ceiling. I did a bit of quick and dirty research earlier and found many examples of people who were charged with indictable offences that have maximum penalties of up to five or 10 years but were sentenced to fewer than two years.
What I really want to emphasize is that even if the Crown were to proceed indictably in the context of these newly hybridized offences, there's no guarantee that those who proceed by indictment will get punishments longer than two years. That doesn't become the floor when you proceed by indictment.