Policy management with Microsoft Intune

A few questions here so let's go:
1. If you attempt to delete an import that has contents that are currently in use, the delete will not complete and it will show you a message letting you know you have to remove the policy first.
2. When new settings are available, you can either back out and delete the import and import the latest version, or create a new file with only the new settings and upload it as a delta. We plan to add upgrade in the future.
3. The Chrome ADMX specifies it's namespace as Chrome using both Google and Windows namespaces, so both must be available for reference for the upload to work. 

We did some work to remove the requirement for Windows.admx since we already have that available globally, but we hit an issue, had to roll that back, and are working on resolving this in the future.