They should have stuck with the previous designs, but they probably knew they wouldn't be able to get it approved by the grannies at city planning.
Once again, the city can't decide whether they want boring or really boring buildings that will "fit in". As Banksy wrote last week, criticizing the design of the new world trade center building in N.Y., "it's plain vanilla...something they would build in Toronto"
Actually, Banksy statement-mongering notwithstanding, I'd counter-argue that a more "enlightened" approach to beholding and appreciating urbanity is not to lament Toronto's vanilla-ness, but to be able to intelligently appreciate NYC's rough architectural equivalents to the present-day 80 Bloor.
And I'm dead serious about that.