Satellite 6 - Deprecated API calls

Does anyone on the Satellite Team have a "solution" for the API calls that are marked as deprecated? Some of these are pretty handy, and I don't want to waste a bunch of time coding them into something then have to re-engineer it later on when these calls disappear.

TIA

System errata

Resource Description
GET /katello/api/systems/:system_id/errata DEPRECATED List errata available for the content host
PUT /katello/api/systems/:system_id/errata/apply DEPRECATED Schedule errata for installation
GET /katello/api/systems/:system_id/errata/:id DEPRECATED Retrieve a single errata for a system
System packages

Resource Description
PUT /katello/api/systems/:system_id/packages/install DEPRECATED Install packages remotely
PUT /katello/api/systems/:system_id/packages/upgrade DEPRECATED Update packages remotely
PUT /katello/api/systems/:system_id/packages/upgrade_all DEPRECATED Update packages remotely
PUT /katello/api/systems/:system_id/packages/remove DEPRECATED Uninstall packages remotely
Systems

Resource Description
GET /katello/api/systems DEPRECATED List content hosts
POST /katello/api/systems/post_index DEPRECATED List content hosts when you have a query string parameter that will cause a 414.
GET /katello/api/organizations/:organization_id/systems DEPRECATED List content hosts in an organization
GET /katello/api/environments/:environment_id/systems DEPRECATED List content hosts in environment
GET /katello/api/host_collections/:host_collection_id/systems DEPRECATED List content hosts in a host collection
POST /katello/api/systems DEPRECATED Register a content host
POST /katello/api/environments/:environment_id/systems DEPRECATED Register a content host in environment
POST /katello/api/host_collections/:host_collection_id/systems DEPRECATED Register a content host in environment
PUT /katello/api/systems/:id DEPRECATED Update content host information
GET /katello/api/systems/:id DEPRECATED Show a content host
GET /katello/api/systems/:id/available_host_collections DEPRECATED List host collections the content host does not belong to
DELETE /katello/api/systems/:id DEPRECATED Unregister a content host
GET /katello/api/systems/:id/packages DEPRECATED List packages installed on the content host
PUT /katello/api/systems/:id/refresh_subscriptions DEPRECATED Trigger a refresh of subscriptions, auto-attaching if enabled
GET /katello/api/environments/:environment_id/systems/report DEPRECATED Get content host reports for the environment
GET /katello/api/organizations/:organization_id/systems/report DEPRECATED Get content host reports for the organization
GET /katello/api/systems/:id/pools DEPRECATED List pools a content host is subscribed to
GET /katello/api/systems/:id/releases DEPRECATED Show releases available for the content host
GET /katello/api/systems/:id/events List Candlepin events for the content host