The team spirit hyperparameter is a crutch they've introduced themselves. Ideally it should be one. In Dota there is only one objective for the entire team and

The team spirit hyperparameter is a crutch they've introduced themselves. Ideally it should be one. In Dota there is only one objective for the entire team and that's to win the game. The fact that they shape rewards is an implementation detail and doesn't change the fact that Dota 2 does not require cooperation, because there's no cooperation game being played. It's a purely zero-sum adversarial game being played between two teams.