The release of the transcripts confirming a big payout to Clinton's friend Sidney Blumenthal will absolutely add chaos and destruction to the campaign. Anytime there is controversial information released on either side of the campaign it is used repeatedly against the candidate. These are typically campaign slurs that change up wording and make it sway towards the opposite party.
Wheather or not this story is relevant to the population it is still going to be a big story, just because it is an election year. People will want to know about this, especially because it concerns suspicious and possible criminal behavior related to a major Presidential candidate in the upcoming election.
Hillary Clinton has always been a political figure who was very much disliked and even hated by conservatives, more so than almost any other politician. Now she is also disliked by many liberals and independents, who feel that she perhaps won an unfair Democratic primary. Therefore, any negative news about Clinton will receive a lot of attention. This will not get swept under the rug.
No, the story that Sidney Blumenthal, a friend of Clinton, received a big payout will not become a big news story. The story will get some news attention, however, it will probably blow over rather quickly. People expect friends of the Clintons to have made money from the government while they were in office. They will find a way to say that it is legitimate.