There has been long time wishes for having the HUD change based on e.g. player count (very useful in SNGs) but for whatever reason this seems very difficult to do.
So, how about another suggestion: Use a hotkey to change the HUD.
Changing the HUD itself from the PT-icon is trivial, so you obviously have the functionality in place to change the HUD on an existing game, so why not enable a hotkey to be bound to a HUD configuration and change the HUD when user presses the key? Personally I'd use something like CTRL+ALT+2 to change to a HU-HUD when at that stage etc. That would be very practical improvement to the current functionality.
I can't imagine this would be that hard to implement.
