Whether Ulbricht is a changed man is somewhat immaterial to the signaling to other young would-be drug kingpins that the President thinks you shouldn't be punished so harshly for setting up online black markets.
I agree: online black markets should be free trade. If drugs were legalized, even fewer issues would exist, and it would be easier to isolate the actual crime which imposes negative, third party externalities like traffiking or violence.