Should I allow a trade of Chris Pronger for Markus Naslund in my fantasy hockey league?

The trade makes little sense to me but the team who is supposed to be receiving Pronger in the deal is very upset that I vetoed it. I feel justified though because there is obviously a reason Pronger is rated 24 and Naslund is rated 110. Naslund is old and the back end of his career, Prongers probably going to do better in every category except for goals and he plays defense which makes him more valuable considering there are several wingers who will put up similar numbers to Naslund but only 1 or 2 defenseman who can match Pronger's output. The owner giving up Pronger has no hope of getting out of last place and is friends with the other owner.