I suggest that when the logined user visit the web site root directory, it would be better if it can jump to the EXPLORE page. Because the web site root directory can't display all the picture. Can this be possible?
They have an upload button in the top menu. So your idea is to:
Show the landing page for guest
Show the explore page for logged users
Usually Chevereto returns to the page where the user was before login, so it will do what you want only if the user logins from homepage. I don't think that is a good idea but if someone else support this request please let me know.