These are challenges. I would add, though, that a lot of the interviews will be with people applying to come here as skilled immigrants, independent immigrants. If they can't speak enough English to take part in the interview, they're going to have a problem in Canada. This is a basic requirement, English or French, if they're going to come. This is a basic requirement that the government is rightly giving more emphasis to. The cultural adjustments, even in a working situation, are important. But if a person is totally out of it with respect to language and culture, that person will have a problem.
You've touched on a sensitive area. It's something that has to be dealt with. But the face-to-face interview gives a Canada-based officer an opportunity that you couldn't get on paper to see if the person is going to be able to handle a Canadian face-to-face working situation.