That situation was similar to one that was faced at Pearson in the nineties, and they constructed a new runway. Knowing the new runway would impact people who had not previously been affected by noise, they put restrictions on it. Essentially they said it could only be used when winds prevented use of the east-west runways. Transport is backpedalling on that now, but that's a different issue.
In the case of Calgary, it might be possible to put more emphasis on one runway than on the other. It might be possible to assign one for arrivals and one for departures. I don't know, but the long and the short of it is that a new runway is there to help the growing business, and this has impacted more people, and that's the dilemma. That's the dichotomy we're faced with: growing the economy or addressing human factors.