I'm fairly suspicious of this idea.

Seems to me that there's enough crime in Toronto to support five courthouses, both for the reasons given in the article and because the single structure can lead to single-point failure of the entire apparatus, whether the failure is due to natural events, bad design, human intervention by way of protests, etc., and the question of what happens when it's time for the structure to be replaced.

I would prefer a long-term plan whereby a new courthouse is scheduled to be built every twenty years or so, incorporating the lessons learned, new technologies and new procedures developed since the prior construction.