T is more than sufficient. As others have said, there's plenty more they could add and still fall under the terms for T. Anyone wanting something more risque has the option to download mods. In this instance, I think it's fine to keep it to mods.
Equally, as an adult whose children are also adults, I don't see the need to make it pre-school or early years appropriate. Teens and adults should have no compulsion to have their entertainment options curtailed simply to fit with very young children. Indeed, I think there should be more done to make clear the separations between age groups from a safeguarding perspective.
