Are you kidding? Franzen is easily the one of if not the best piece of trade bait the Wings have. The only drawback against him is the length of his contract, but considering his production vs his cap hit he's among the best valued players in the league.
Who cares if he needs a set-up man to produce, he's not paid to be a superstar, he's paid to do exactly what he does every season. Put up around 30 goals and produce around 50-60 pts.
What exactly do Franzens critics expect of him? 40-50 goals? If so he should be making a lot more than 3.95 million a season.
But. He shies away from contact. Opponents know this and are going after him more and more. Ergo, his production continues to decline and because he stays out of the corners the Wings are easier to defend when Franzen is out there.