In Notes Mail, the icon to delete a mail item in the Inbox view is different on the Toolbar (shows as X) versus a in a row in the view (shows a trashcan)... see attached screenshot.
The icon on the toolbar can be added by customising the Toolbar, but the trashcan is not in the lost pf available icons. The result is two different icons for basically the same purpose... "Delete" and "Send to Trash".
Additionally, the "Save" icon in this release is not representative of a Save function. The old icon of a floppy disk is much more intuitive and seems to be almost a standard. Just Google "save icon" and you'll see what I mean.