Erik Gustafsson and Travis Hamonic being shopped? Why would Detroit willingly trade away depth?

From Locked On Red Wings - Daily Podcast On The Detroit Red Wings Locked On Podcast Network, Brian Fisher, Scott Bentley

The Detroit Red Wings are off to a hot start, with a lot of young players. This means though that Erik Gustafsson, Travis Hamonic and Justin Holl have been pushed out of the lineup, and into Grand Rapids. Dave Pagnotta now reports Detroit is actively shopping some of these D-men. Why? Also, is Detroit's defense good now? #LGRW