1. If you have created the configuration with only Usage and description, it should not create any violation case if usage and description are there in DT. Re-verify your configuration and check for the violation details in violation case.
2. On rejection of violation case, it will not make any change to the respective rule. The rejection flow is being shipped as an extension point. Customers need to override that flow to achieve such use cases.
3. If you are raising any exemption for any rule, it should create an exemption case. Case should get routed to WB or WL mentioned in the configuration, or check for that case in "PCM-Exemption" WB.
PCM installation videos will be uploaded shortly in the same PDN exchange page.
The configuration you have created has 2 settings, it will create a case when a DT doesn't have usage and description and It will not allow developers to update any DT. Restricting developer action is not dependent on the governance purpose you have selected, this settings is used to restrict any CREATE/UPDATE/DELETE operation on any rule type (irrespective of any governance purpose)
Kindly reply on above queries. The PCM video and PCM features is contracting to use. Kindly let us know any GCS support or developer team we can keep in touch to understand what is possible and what is not possible in PCM.