Write better documentation for co-management
The documentation for co-management is very poor or vague in areas that makes the adoption of co-management very difficult.
Some work needs to be done on this article in particular... https://docs.microsoft.com/en-us/sccm/core/clients/manage/co-management-overview
It doesn't talk about permissions or what to do to shift workloads to Intune.
You can submit changes to the docs via GitHub. Also, there are lots of bloggers who have multi-part posts on how to set up co-management. Look up scconfigmgr.com and anoopcnair.com guides.