Other changes include built in Google+ sharing, of course, and some new filters and updated photographic frames. Those frames can be colorized to match the colors in your image.
I've always liked Snapseed, and at free it's a must grab. Sadly, the OS X version of Snapseed remains at $19.99, but it's worth it.
Google also today released Snapseed for Android phones, where it is also free. No surprise there. Google = Android.