The toe is used for quick starts, and the heel is used when making deep turns, and so the shape of the heel and toe presumably would affect these critical parts of hockey. But how does one even go about specifying the shape of the heel and toe?
You would think this would be part of profiling, but profiling only affects the middle ~60% of the blade: https://wissota.com/skate-blade-profile-rocker-explained/. As seen in the picture of that link, the heel and toe in a stock blade deviate significantly from a typical 9' radius. Plus different models/manufacturers have different stock shapes at the heel and toe.
There are discussions on "shaving" the heel and toe, so other people do also have issues with the shape of the heel and toe:
Furthermore there are many opinions about shaving the heel and toe being bad without specifying what a good heel/toe shape is, or why one shape is better than another.
I'm interested because I'm having a hard time adjusting to my new Supreme 2S Pros (w/ LS5 steel), after many years on Supreme 3000s (from the early 90s), which have a more rounded heel and toe. It's making it very hard to adjust. In particular, accelerating quickly, which I do on my toes, is more difficult (feels like I'm wearing skis) and I often trip, which I think happens when I hit the corner at the toe of my skate. It's also harder to make sharp turns. I had a 9' profile put on (vs the stock 10') but that made basically no difference, which is not surprising given that my issues come from the heel and toe.
I guess I should ask to have my heel and toe shaved, but as far as I can tell it will just be freehand. It seems odd that there all sorts of precise specifications for the profile in the main part of the blade (radius, center offset, etc), while the heel and toe is like the wild west.