Sure, it is very uneven music, but I have to agree, Hamelin plays the hell out of them and gives you the best chance to evaluate their worth for yourself. However, the last sonata is a good piece that is worth your time. It has a movement for left hand alone, a movement for right hand alone, and a movement for both hands combined, with much of the same previous material. It looks a lot like updated Alkan to me. One of the best Canadian composers for sure, but, really, that doesn't really say much, heh.
The 6th Sonata definitely seems most worth learning out of the set, although that 3rd movement would probably going to take a while to learn.I played one of the caprices which was neither difficult nor profound musically.In terms of Canadian composers, my favorites are Jacques Hetu, Howard Bashaw, David McIntyre, and Denis Gougeon.