I just spent a few minutes on Google Photos, and it seems to be primarily for photo storage and organization, and not so much for social media. The editing tools are not as complete as + was but are much easier to use. I didn't explore all of the different methods of organization, but one nice feature is that the photos are sorted by the date taken rather than the date they were uploaded. I'm still dissapointed that there is no tool for making collages, but I use Picasa as my primary capture program and it has all of the tools I need. Overall, the app is cleaner and easier to navigate than Google+, which by the way will continue to exist as a social media outlet for photos.
Phil