I wouldn't mind the idea of incorporating some old-looking reconstruction into the mix. For example, it might be beneficial to extend Granville Street northward with buildings of a complementary style that double as podiums for larger modern buildings behind.
Even though Halifax has many old buildings there aren't any streetscapes as
cohesive as Granville, and if they could build off that without turning it into Disneyland, and ensuring the spaces wouldn't sit idle it could turn out well, like Rue St. Jean in Quebec City.
Modern is fine too, I just hope they integrate the streets together well. Granville obviously isn't working as a dead end and it might be worth somehow redesigning the International Centre or whatever that neverending proposal on the triangular lot is called.