I think its a good idea. It never hurts to see more examples and approaches.
Plus, I think people are inclined to make different decisions when they arent working on their own music, which can be a good thing. For guys that are new and trying to learn to do this stuff.... they often dont have any material yet other than what they have created themselves.
Its good to have a fresh set of ears working on things when that set of ears hasnt "lived with" the song for an extended period of time.
Kinda gives nice perspective to all parties