it was just a random thought that i had when reading this post. i completely forgot about the button on the profile page - *slaps self.
i know it would be extra work - but just wondering if maybe you might think about adding an admin feature that allows the admin to view the site as different membership levels - without having to log out of the admin account?
The current version of cheetah allows you to log in as a member. The button will be on the action menu of the members profile when viewing as admin. So you can do what your asking by simply logging into an account that has that membership level. You can use a test account for this and just assigned the membership level you want to check to that test account before you switch to it.
It still technically logs the admin out and and then in as that user, but the feature your requesting would also have to do the same because keeping admin privileges while testing a members account or membership level would not provide a proper or accurate test.