Mueller may not have found any collusion, but with his crack team of anti-Trump Clintonistas, he may have concocted enough innuendo and unsupported hypotheses for the media to bash Trump with for the next few months. Just maybe he will claim to have found evidence of "obstruction of justice" either in the firing of Coney or statements Trump said about his efforts or about Jeff Sessions.
Innuendo doesn’t belong in a report of this type. So therefore Mueller may insert some.