Metro maintenance yard and the switches are not part of this project. They were already built as part of the Crenshaw (C/K line) project.
The delay is multifaceted but all ultimately Metro's responsibility. The LAWA portion of the project is largely done or on time except for the station work that they purposely slow down to manage the cashflow in response to Metro delays. The ITC West, rental car center, and elevated guideways are all finished; and all the APM trains have been delivered and stored.