If my player is at 44% energy, how much worse does he play than a player at 75% energy?
Does this effect every game type that he plays? (Scrims, SoloQ, stream, team)
As far as I know there is no offical statement on that and even testint that is quite hard.
So I cannot give you an answer here.
But is does affect everthing, so performance in soloq,ranked 5s, league games, streaming revenue and training.