I'd also argue he almost certainly saved a huge number of lives with Silk Road: the ability to view eBay style feedback and chemical test results makes buying illegal drugs far safer than buying them on the street. On Silk Road people could buy from a reputable seller with a long history of providing unadulterated products, and could view testimonials from other buyers who had sent the products for chemical analysis.
If I remember correctly, there were comments from both the prosecution and judge that would basically prove that point- and they allowed evidence related to those other crimes in the trial. If they could prove this misconduct, they may even be able to argue double jeopardy.