sbiddle: A lower frequency that travels further isn't a good thing from all angles. While it improves inbuilding coverage it also makes building networks far more complex because signals do travel further, which increases noise in a network. At the end of the day noise floor is the single biggest problem facing any wireless network.
The future of WiFi for example is 60GHz, for the reason that it will only work in the room where the AP is.
I understand this, but when it comes to addressing the OP's issue of poor coverage in remote areas, it does assist in this?