I agree with Nobody, even though I simultaneously sympathize with SJS’ position.
It *would* be helpful to compare and contrast, interview like, but I would say mentchlichkeit comes first, and the added benefit is not worth the loss in mentchlichkeit.
In the Shidduch scene, every dater enters a potential relationship with the attitude of: this could be my bashert; I’m going to focus and put everything I can into this relationship. Double dating does not facilitate this mindset, and I would say it does “use” the unknowing people involved.