Once an email in a blast campaign has sent, if it is not set to repeat, the date field clears and there is no indication of when it was sent without a couple clicks.
Would love to see a string of text added to show when it was sent, which would be helpful in identifying when we should set the next one, and so on.
For any communication item in a campaign (Nurture, Blast or Event), if the status under the icon shows "Delivered", hover over that label and a tooltip message will appear listing the last date and time the message was delivered, e.g "Emails last sent at..."