I don't. There are certain hours--and I can only speak for Ontario--allowed for this sort of thing. I would think if we go to the current regime, where you have to have the accused show why they shouldn't be, they will be the kinds of cases that we call in Ontario “big case managed”.
If your documentation is that the crown needs 600 hours, I would think it's going to be more. It'll be a great burden on the legal aid system. I can't speak for the other provinces, but I would think it would be that way across the country.