I think what you are missing here is that there was collusion between Russia and HRC. They are trying to establish a reason to investigate that. Remember she actually handed over top secret info and gave various government access to her server. So through an investigation they will establish eventually that there was no hacking by Russia but the access to her info was handed to them by HRC herself. This will then exonerate Russia and Putin. Putin played Hillary for fool when he made the U1 deal to entrap her, IMO. The report says Russia colluded - reason to investigate further. This a subtle way to introduce this evidence. Trump on his arrival yesterday in DC indicated that it is the Dems' turn to be investigated. Chess game.