Time to stop the slow drip and dump everything NOW.
That he hasn’t released it all yet is probably the only thing really keeping him safe. He’s not stupid; he’s arranged things so that if he goes incommunicado for any reason, ever-larger dumps of devastating leaks will appear, and not just implicating the most obvious suspects i.e. attacking the US and the election. There will be embarrassments in there for plenty of hitherto-uninvolved leaders and public figures around the world, to ensure that there are plenty of powerful people out there who have a vested interest in keeping him from disappearing.
Presumably, there are clandestine phone conversations going on right now all over the place, with people being pressured to leave Assange alone. And really, his death is irrelevant by now. Petty vengeance won’t stop the leaks, and could well make things far more uncomfortable for lots of people who aren’t currently affected by the scandals surrounding Clinton et al.