scores with multiple subscores is a bit of a mess

[turian]

 def __call__(self, *args, **kwargs) -> Union[Tuple[Tuple[str, float], ...], float]:

is a bit of a mess. We should do this more cleanly and consistently. In fact, we should never have a score that returns a float. It should always return a tuple.

[khumairraj]

Sure. This will be more consistent