There's a concern, and it's not unique to Canada, that as fees are lowered at one end, they're raised on the other. I don't have chapter and verse on this, but merchants will complain that they've seen some savings in some settings from some of the reductions, particularly the ones in 2015 and 2020, but there's been a proliferation of other fees. That's the concern they have.
However, I don't get as much feedback from members, other than perhaps a bit of frustration with respect to network fees.