One feature missing from the new A360 online UI is the ability to place pointed comment bubbles. You can still make comments on a drawing but you can't locate them on a drawing. This is an extremely useful tool for me and my coworkers, so I have been sticking with the old UI as long as I can to keep this functionality. I hope this can be added to the new UI in the future.
Additionally, another feature that would be great that is missing from both the new and old UI is the ability to modify or delete comments after they have been posted, at least if you are the user who posted the comment.
