Provide the ability to identify features that are deactivated using CSOM
It's currently possible to identify the features that are activated at the Site and Web level using CSOM, it isn't however possible to determine which features are present but not activated using CSOM. It would be great if this feature could be added!

Thanks for your feedback! Although we appreciate your time and effort to give us this feedback, it’s not something we’re planning to do right now. We are targeting our API efforts on the Graph API side and due to internal prioritize are not planning to allocate resources to new CSOM capabilities.
If this capability is important for you in the Office 365 platform, we do recommend submitting a specific requests towards Microsoft Graph API changes to address the possible gap.