Hello @francis_harris,
This isn't a perfect answer, but there are some changes that have been made that allow you to alter the default experience of your workspace instance if you are an Admin.

Click Edit preferences.
On the General Tab, you can increase the listed metrics, dimensions, etc.
Then, using your VRS you can control what dimensions and metrics are available to use (permanently). This will prevent unwanted items from popping up.
Again, not a perfect solution but what is available at the moment.