Thanks Kathryn-
First- know that when I select a feature image, I always expected that image to be inserted into the post as well.
Old process:
1) Click "set feature image"
2) Choose file
3) Add caption, title etc as warranted
4) choose justification (left right none etc)
5) Insert into post
New way:
1) "Choose featured Image"
2) Choose File
3) Add caption, title etc as warranted
4) "Update Featured Image"
Then...
5) Click "Add Media"
6) Choose File (Again)
7) choose justification (left right none etc), sizing etc
8) "Insert Into Post"
Steps 5-7 are all duplicates of steps done when adding the featured image.
Twice as many steps including navigating the media library twice, etc.