I don't buy this at all (that DD needs Bargs to spread the floor to be effective). Last year DD had his best month of the season in February when Bargnani was out. His ppg dropped slightly in January because he played on average 2 minutes less then in December, and he took fewer shots. He also went 3 for 20 from behind the arc.
I have never really seen him play better offensively then he has over the past 5 games.