This function worthy of consideration also?

According to a blog, now Gmail directly use "delete" button to delete unwanted emails in Gmail account. To my personal viewpoint, I am thrilled about this function added because it will denefitely faciliate to manage g-mails. However, is such a function that the undesired title (sometimes no title) of received mails in Gmail needs to be changed is worthy of a consideration? One mail service has done this long before.