As I said, in these questions and in the whole discussion, it's not black and white. There are advantages and disadvantages. One of the advantages for me in retaining first past the post at the local level, as long as it's profoundly affected by PR, is that Canadians would more readily accept a new system without too many changes. They're accustomed to electing their local MP by a certain traditional method.
You could also have, at that level, a preferential vote for the local MP as well. Some people would favour that as being more democratic, and I can see the argument for that system. I could accept either approach for electing the local MP.