BTN gets pretty decent viewership with their football and basketball coverage. Out of all the college conferences, the big ten is probably the most popular in Canada. It's probably because many areas of Canada get Detroit locals and they have always had pretty extensive coverage of Michigan and Michigan State.
I certainly do not watch all the HD channels available but I don't have an issue with any of the channels that they carry. The only one I took issue with was "The Frame" and it's gone now. It's fine to have filler channels like that if you have the bandwidth but Shaw Direct's bandwidth is scarce so any available bandwidth should be prioritized for specialty channels and network television.