But doesn't the Espionage charge achieve kind of the same thing? Was he really spying for anyone? He wasn't. So I still don't see this as a fair verdict.
It's pretty much impossible for any judge or jury to find him not guilty of all charges when he leaked over 700000 documents that had absolutely nothing to do with anything illegal that the government was doing. If he had only stolen and leaked incriminating information, his case would have been much stronger.
He took classified data outside his purview and provided it to folks without access, which seems like pretty clear espionage. You don't have to be working for a particular foreign government to be performing espionage.