Applescript to batch change "title" in Photos

I'm trying to use the new Photos, but without being able to batch change the title, it's not going to work for me. I saw a script in a previous post that shows how to do this, but I couldn't get it to work - apparently the script only works on small sized photo databases? Mine has about 20,000 photos and 1,700 videos.

Has anyone come up with a solution for this? Photos is pretty much unusable without being able to batch change things like title (primarily) and photo name.

Eric