The problem is that if you increase the number of members by 30% or 40%, it may well be unpopular. Previously, I proposed 10 more members in Quebec and that caused a problem. In addition, you are going to have to increase the size of constituencies by 30% or 40%, which may be very unpopular too.
The other limiting factor is that it cannot be done before the next election. You need at least two years to draw up a new electoral map. And there is always drama because some constituencies in Canada are the size of a country.