The new Outlook interface is bland and ******* the eyes
Make the distinction between read and unread e-mails absolutely clear. It helps to have flagged e-mails in a tan shade so they now stand out. For unread e-mails, make the whole box black with reversed type so it's unmistakable they're not yet read. Once they're read, make the text not as bold in the inbox pane, like it used to be. With the new change, the only difference between read and unread e-mails is that the subject line is in blue. Also, the top menu is so light and faint and the spacing makes each item blend into the next. Make them stand out with boldness and color.
Another thing: please don't feel like you have to make changes so often. It just adds one more layer to our workday to have to adjust to so many changes. They're not needed!