I have a small gripe with the way comments are displayed for document based collections. Until recently they were ordered top to bottom (oldest comment at the top), now they are ordered with the newest comment at the top.
I realize this basically unifies the way comments are handled and thought I would get used to it, but that hasn't happened so far.
This might be due to the comment field not being as narrow as for normal collections and also because new comments are still added at the bottom until the page is refreshed. It's also easier to miss new comments from customers that way.
Similarly it's also easier to miss short remarks, greetings etc. at the start of the comment, now that there is no longer a line break after the introduction, although that might once again be due to habits developed when that wasn't the case. Either way short remarks can blend in visually with the comment title.