When there is a group of files, in the past I was able to delete, promote or pause specific ones.
Now, it's only doable on a group level.
In some cases, I find this very useful. For example, an NZB failed and I want to download it again. I have 90% of the files and I want to load the NZB partially.
Using older versions, I could always download the entire NZB and remove all the individual R* files that I didn't need. Now, it's impossible - I have to download the whole thing again...