With GNOME 3.13.2, there is temporarily a dependency on systemd due to Wayland development, but prior to GNOME 3.14 the systemd dependency will be made optional again. The release announcement mentions, "Note that as part of Wayland development, 3.13.2 temporarily depends on systemd. This is needed because Wayland support in GNOME depends on systemd, but before 3.14 is released Wayland support will be made optional."
Among the changes to find with GNOME 3.13.2 is Mutter on Wayland supporting HiDPI displays, many updated language translations, GtkInspector was added to GTK, gesture support was added to GTK, GNOME Music gained remote sources support for Jamendo / Magnatune / UPnP/DLNA, and various other changes.
The GNOME 3.13.2 development release announcement can be found on the GNOME mailing list. As usual, this next GNOME release can be expected for its official debut in late September.