The akku method is very frustrating, because of the issues the thread starter pointed out, but I doubt we will see this done, as FD never intended to have the HUD colours changed, they just optimized the ability to properly change it slightly, but that's about it.
Besides, Elite uses the RGB method itself, it seems, so implementing a "proper" method might be too much of a task given how much other stuff they have to work on. Still hope it becomes a reality.