What I often wished DO could do and what I'd like to see in DO11 are "ghosted" files representing in destination those files which are queued to be copied/moved. They could be represented as grayed-out files along with existing files in destination. For any active file which is currently being written there could be a tiny progressbar next to it (perhaps integrated with file size column).
Or at least indication that the file in destination is currently still being copied/written into (now it just appears in destination and you can't be sure if it's fully there yet if you have lots of files and minimized progress window).
I like the idea.
Also, all files/folders that are being copied should be marked, not only those which are queued (and not actually being copied right now).
(By "being copied" I mean - included in ongoing copy/move task, as opposed to being read/written to.)