Comment UI was better in former version
Each comment in the column on the right hast to be opened to be checked with done (check mark). But then the answer-field is opening and the answering field of the former comment will be closed. When the checkmark is not set, the comment is always shifting a bit up. That makes a work with 500 corrections really bumpy/uneasy.
The size of each comment is also too big. In the former version there were 17 comments on one screen, now there are just 9 comments!
Make one comment without opening and smaller and more clearly arranged without moving!!
In the CS6 version of Acrobat Pro it was much better!!!!
Kelly Vaughn commented
YES! I still use Acrobat 9 every day because of the better UI for commenting! http://documentgeek.blogspot.com/2015/04/why-i-run-four-different-versions-of.html
I hate your new version, and loved the older version. The graphics and tool bar are horrible in this new version. It is like you went backwards.