Well, it's a Canadian radio station, so I doubt they'd back off on the Hip. Still really popular up here, one announcer calling them Canada's Beatles

Interestingly both the Tragically Hip and The Headstones both came out of Kingston, Ontario. More trivially though, they all went to the same high school. It's fairly blasphemous to say so, but I prefer the Headstones to the Hip. Now that the Headstones have broken up, I'm sure they'd let that album slide up the list pretty far.
As far as Nickelback is concerned, another Canadian band so they'll not be slipping on the list much at all.
As for Creed, well, I'm still shocked it made the list at all.
Part of the initiative for some of those choices is a little known (outside Canada anyway) legal mandate for Canadian content on radio and television. I no longer recall the required percentage, but it was around 30-40 percent at one point. In place to give the Canadian talent an opportunity without being overwhelmed by the inundation of Americana. There are also some other weird quirks in the music industry with US vs Canada bookings and the like. Those aren't mandated but function as unwritten laws. Weird ****.