When you visit https://en.wikipedia.org/wiki/Main_page?action=info, it's not very simple to understand that this page is a redirect and that consequently the data presented pertains to the redirect page, it does not pertain to the target of the redirect. This isn't a huge problem, but it can be a bit disorienting, I think. (It'll be even less of a problem when this action has some UI exposure. Manually created URLs are cruel.)
Somehow, I think the redirect status of a page should be displayed in the info action's output. Maybe with another row in the table (Page is redirect: True), maybe with italics, I don't really know.
I suppose one could have something like "Page status" where it would read:
- content page
- non-existent? [deleted?]
Not sure. This needs thought.