There's a brand new WordPress administrative interface and a separate app for the Mac that provide a powerful new way to edit and manage content across many different WordPress sites. I talk about it here - and reference these articles:

https://en.blog.wordpress.com/2015/11/23/the-new-wordpress-dot-com/

https://developer.wordpress.com/2015/11/23/the-story-behind-the-new-wordpress-com/

http://om.co/2015/11/23/some-thoughts-on-the-new-wordpress-com-and-mac-app/

http://ma.tt/2015/11/dance-to-calypso/