Unlike other systems, those votes would go to other parties, to the second-choice parties. That explains the extra seats for the Liberals and the NDP. You can see that they're slightly overrepresented there.
Another challenge would be the number of candidates on the ballot. Let's say, we have Manitoba and Saskatchewan. I suggested to have nine local constituencies and five regional seats instead of eight and six. With nine people from the same party, many would just go 1, 2, 3, 4, 5, 6, 7, 8, 9. For others, you would have to explain to them not to just put number one, not to just put an X, but to go all the way down, because if you only specify one preference and it doesn't win enough votes, your ballot is exhausted. Obviously, that will require—