If one attempts with the new software to edit a
redirected page
(by fiddling with the URL) one is simply redirected to the
destination. So it becomes impossible to resurrect a page once
it has been redirected.
When you arrive at a redirected page, you'll notice that the
subtitle is "Redirected from..." with a link; that link will take
you to the original page. Clicking "edit" while there will edit
the redirect page, not the destination. You'll notice that
"redirect=no" has been added the URL--if you want to use the
URL directly, you'll have to do that too.