Nonsense. To harm or get rid of Hillary it should have been timed earlier. Wikileaks clearly needs a lot of time to process such massive leaks. They are doing journalists work after all.
A few months ago there was still a chance to get a non-criminal, not-lying nominee who would have had a chance against Trump. Now it's too late already. The only outcome was Wasserman Schultz being promoted and Trump leading the polls. All this was entirely expected.