I am not sure why these changes were made because it doubled my productivity when grading student work. Every time I assess for grading, I am not frustrated! 

These are my complaints: 

All replies at once can no longer can be viewed. 

When I am looking for my own responses in past courses to use for my current course, now I must click on each students reply to see my own 

It is impossible to follow a thread. 

The order has changed, and the newest replies are at the top, this makes it even harder to follow.