Release 4.1 of WordPress came out on Friday so after some work to fit in with the Debian standards, the Debian package 4.1-1 of WordPress will be uploaded shortly. WordPress have also updated their themes with a 14-day early theme called twentyfifteen. This is the default theme for WordPress 4.1 on-wards.
A significant (or invisible, depends on your browser) is the mediaelement components now don’t use the un-maintainable silverlight and flash plugins, which is the same how the libjs-mediaelement package works. In fact the code IS from that package.
As I was looking into the embedded js/php code in WordPress, I also had to look into how the previous maintainer kept all the versions in order without some horrible mess of patchfiles and symlinks. The answer was dh_linktree. This program plugs into the standard debhelper rules file and can basically use symlinks in the package to use the standard Debian versions of files. It a bit cleverer than symlinks in that you can say use the link always or only if the files are the same.
If you need to remove some of your embedded code out of Debian packages, have a look into it. It might save you a lot of agnst or hand-crafted rules files.