Returning to the just-published post is on purpose. More people “brush up” the just published post than immediately begin a new post. After viewing the post on the live site, many users go back and fix typos, clarify a sentence, add categories, etc. When we did testing, users found it frustrating that to do so they needed to click on Manage, then on the the post to get back to what they were doing. Also, new users sometimes think that the blank post form means that their post was deleted. If there are a significant number of people who feel strongly that they’d rather go to a blank new post screen, maybe someone will write a plugin? Maybe in a future version we can make this a preference setting, which type of screen to show after hitting publish, but that extra functionality isn’t part of 2.7.