Although Office 365 offers an optimized UX for mobile devices, have you noticed that it doesn't offer the ability to search for information?
When inserting a link from SharePoint in Rich Text Editor SharePoint uses the physical URL of the selected page in the hyperlink even if that page has a Friendly URL configured.
SharePoint 2013 Search allows you to easily find the content that you are looking for unless you’re looking for pages with Friendly URLs in the list view.
When working with Managed Navigation, menu items linked to pages with specific permissions set are automatically hidden from users without those permissions.
When working with Managed Navigation, menu items linked to pages that haven’t been published yet, are automatically hidden from anonymous visitors.