Page and Block Visibility Formula


I know Coda has very limited access control capabilities but we still need to a way to do this without using multiple docs. What I have thought of which could be a relatively easy approach would be to be able to set a formula for the visibility on each page. The formula returns true if the page should be visible for the user, false if not.

That way we could do that kind of access management by our own using tables (and for example restrict certain pages to certain departments easily). What would be nice to have in the same way are block visibility formulas (but page visibility formulas are much more needed right now).

What do you think?