"... The most significant item lost during the SPX-7 mission was the first of two Docking Adapters necessary to support upcoming commercial crew missions. Although NASA had planned to have two Adapters installed on the Station before the first commercial crew demonstration mission scheduled for May 2017, it is now likely there will be only one installed in time for these missions.
... we also found that for the first seven cargo missions NASA did not fully utilize the unpressurized cargo space available in the Dragon 1 capsule's trunk, averaging 423 kg for SPX-3 through SPX-7 even though the trunk is capable of carrying more. The ISS Program noted that unpressurized payloads depend on manifest priority, payload availability, and mission risk, and acknowledged it struggled to fully utilize this space on early missions, but as of June 2016 the Agency's cargo manifests show full trunks on all future SpaceX cargo resupply missions.
... risk mitigation procedures are not consistently employed and the subjective launch ratings the Agency uses provide insufficient information to NASA management concerning actual launch risks. In addition, NASA does not have an official, coordinated, and consistent mishap investigation policy for commercial resupply launches, which could affect its ability to determine the root cause of a launch failure and implement corrective actions."