FT in the USA has a number of significant differences from FT here, and the power issue is only just one of them.
In FT, if you go to another country you expect variations from the rules that you are used to at home, so long as the core rules are adhered to. I see no reason why that shouldn't work in HFT. Yes, it's right to expect the courses to be of a common standard of difficulty; nobody wants to travel thousands of miles for a walkover course that is no real test, or one that is impossibly tough. But within that, there is ample scope surely for course designers to be creative. They are now.
The OP was asking for ideas, I've just put some forward.