It wasn’t that big a deal for me because I just used ANZAC roundels for all Commonwealth territories so I covered up both British and Canadian roundels.
With this game, I am not a fan of having Canada as a separate power. I know that Canada contributed a lot during the real war, but in this game they are just too weak at 7 IPCs per turn. In most of our games, ANZAC never really gets to contribute very much because of their remoteness and small income. I think it would be even worse for Canada. At start they have 1 Minor IC/Minor Factory, 2 infantry, 1 artillery, 1 tank, 1 transport and 1 destroyer. They don’t even have any aircraft (unless you modify the setup) and would take 2 turns just to be able to buy 1 fighter.
I also didn’t like weakening UK’s economy -7 but if you play with a combined UK income then that isn’t such a problem.
Now, Italy also starts with only 10 IPCs per turn, but they are in a more centralized location and start out with a good sized military. So you can get things going pretty good with them depending on what UK does and if they get some help from big brother Germany.
That’s why I like the Commonwealth idea. I include South Africa in it so they start with 20 IPCs and can make more of a contribution and a variety of places to assert that influence. Also, changing the starting Minor factories to Major factories helps too.