The report says the FBI used "raw, undetailed" intelligence to make its decision. The report did not recommend sweeping changes to the way the FBI operates.
The findings were made public in a letter to Congress, which is expected to act on them soon. The letter was written by former FBI director James Comey, who was appointed by President Barack Obama. The full letter can be read here: http://www.dailymail.co.uk/news/article-183876/FBI-recommends-sweeping-changes-to-how-the-FBI-operates-after-Hillary-Clinton-spokesman-said-she-was-involved-in-an-attack-on-her-campaign-and-that-she'd-be-witnessed-it.html.