Well, I went to O'Canada again this weekend and have now seen the film 11 times. My take is while the film is, or was, more so the the first few times, entertaining, the jokes wear off the more times you see the film. This is unlike the original film where I could watch it several times during a month and not get bored with it.
The more I listen to the underscore, the more I am not that impressed with it. Now I wouldn't have made the comparison just watching O'Canada, but I managed to watch Reflections of China immediately followed by O'Canada. Seeing the two films back to back, at least in my mind, really shows how much more powerful the score to Reflections of China is, and how important a powerful score is to the overall enhancement of the film. As noted in the posts above, and which I now agree, the O'Canada score really doesn't stand out on its own, whereas in Reflections of China, it really grabs you and pulls you into the film. I think the old version of the film had score elements like Reflections of China, music that really stood out and enhanced the visuals.
I said it before, but I really (really) don't like the new version of Canada, Your a Lifetime Journey. This new version is, to me at least, a negative to the overall experience. But, the load music is very nice and hopefully will be released in the future (it's only a few minutes in length). Everyone will make their own judgement about the film and underscore, but I would be curious to see the thoughts evolve the more times the film is seen.