Leave Production site viewable while having a Promotable Sandbox.
Currently when you create a Promotable Sandbox, you cannot look at the table, view, form or filter definitions. I understand not allowing any changes. But now I can't even look at the definitions. So if I want to save off any of these objects before I promote the sandbox, I can't.

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Leeana Ramos commented
Hello Michael,
Thank you for submitting this idea! I found an article that covers Promotable Sandboxes in greater detail, the purpose for them.
https://help.trackvia.com/knowledgebase/articles/1959892-creating-a-promotable-sandbox
If you see that you may be running into an issue with your Promotable Sanbox, please do not hesitate to reach out to our support team!
Thanks,
Leeana