I don't expect a lot of people to take this up. Express Entry was already an option for these folks and you get permanent residency from the start under that program.
So, yeah, probably still relatively low takeup, but it's going to solve a corner case that, if I had the energy or interest to move back to Canada (which unfortunately seems to have suffered lots of the same issues the US has in the past several years, just in differing flavors at times), I'd be thankful to have solved.
So many of these "talent" visa's don't look at talent at all.