I write about Pinterest on my website and I'm trying to keep up with all the changes. I know about the metric changes and have that down as to what's the same and different. Here's what else I've noticed has changed:
Dates - only shows up on mobile
Categories - gone
Created - contains pins (Story Pins show up first)
Saved - contains boards
Tried - shows pins you've tried
Pencil icon (left) - lets you edit your profile
Plus Button (bottom right) replaced the red plus button (or at least I think it was red!)
Hashtag - I heard we shouldn't use these anymore. The app still has features for it so I'm not willing to pronounce them dead.
Group Boards - still work, but not for driving traffic? Work better for collaboration and feedback.
Featured boards - gone?
Guided search - going away in place of trends?
Any others you can think of, let me know. I would like to keep up to date on it as best I can as well as update any older posts to reflect the current information.