Facebook seems to be working on enhancing the Pages experience on its platform. The possible changes in Pages include a new Page layout and new Admin options.
The Like button is going to be replaced by a Follow button and in place of number of people who like the Page, number of followers would be displayed.
As for the Admin controls, when the Admin of a Page makes any changes or adds something like a check-in location, the rest of the Page managers will also be able to see it.
Moreover, all the new Page content will be displayed on the Updated Page only and not the old Page.
These updates are not likely to affect your existing Page content if you are an Admin and a preview of the updated Page will be shown before you publish your content.
Similarly, you can continue creating ads and managing campaigns like before and your current ads and campaigns will also remain unaffected.