On the third hand, Assange spent time suggesting that the information definitely didn't come from Russia, and suggesting it might have been Seth Rich. But information came out the shows that he was talking with Guccifer 2.0, who was widely suspected (at the time!) to be GRU and if he wasn't, was meant to be a Romanian hacker, not a DNC whistleblower. So there's at least tenuous evidence that Assange was willing to both work with Russian intelligence and rope in an entirely unrelated death to muddy the waters on where the info came from.
Going by my earlier comment - I would coordinate with the Satan to release true information, the source of the information does not necessarily contaminate its truthiness. Publishing true information, as a hypothetical whistleblower organization, is my hypothetical raison d'etre.
This only ever becomes suspect if I am selectively publishing, or if I am aware that I am selectively publishing.
In this case there needs to be evidence of either. Conversations with biased parties are not evidence unless they clearly state that the selective publishing is known.
It's also extremely important to realize what exactly the voters learned from the emails. CAP President Neera Tanden, and a prominent figure in HRC's campaign, expressed sharp criticisms for her favored candidate's judgment. DNC Chair Donna Brazille emailed privately about how the statistical job growth under President Obama was essentially a "technical" win, but had very little impact on people's lives. She also went on to leak debate questions to her favored candidate, exposing one of hundreds of different instances of a party-wide effort to sabotage the primary process.
Contrast this with the RNC primary. Virtually the entire party leadership loathed then-candidate Trump. As opposed to rallying around him, they actively rallied against him. In October there were discussions of replacing him on the ticket. Even at the convention, Ted Cruz reportedly went off-script and asked attendees to vote their conscience, as opposed to voting for candidate Trump. The divisions in the GOP were laid bare for the world to see. The divisions in the DNC stayed hidden from voters. Voters only learned much after the election that Donna Brazille contemplated replacing Hillary Clinton with another candidate after she fainted on 9/11, an event that ironically followed weeks of mainstream media outrage against "right wing conspiracy theories about Hillary Clinton's Health", which also included a pickle-jar opening gag on a late night talk show.
What truths would Wikileaks have exposed about the RNC that weren't already publicly known? Is this an empty box containing any convenient allegation?
One of the USA's major political parties sabotaged the primary process, engaged in debate cheating, media manipulation and bird-dogging, all for a candidate whom many of the party's own leadership found wanting in terms of judgment. After all this - the outrage seems fixated on the messenger, Wikileaks, as if their alleged selective leaking somehow absolves the Democrats of these monumentally disgusting actions.
If you look at the election from the perspective of damage done to candidates - the sheer volume of substantiated negative press received by candidate Trump makes it really difficult to argue that voters could have somehow heard something else from the RNC's emails that would changed their minds about him.