Bring HACS components like HA Card-Mod, Custom Button-Card, Streamline Card into the core program. These exists because of lacking features in the HA program, and are used by many. Adding them to the HA program will increase usability and reliability.
Closed. This is not something the core team have control over. Talk to the 3rd party developers, they are the ones who decide if their work is included in the core.